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Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest and most influential physicists of all time. Einstein is best known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics.

What are 3 things Albert Einstein best known for?

What did Albert Einstein invent?

On his quantum theory of light (that light is a particle or photon);

On the existence of atoms (the Brownian movement);

On his theory of special relativity (that length and time are not fixed and depend on the observer's frame of reference);

There were, in fact, unique features to Einstein's brain that may be the answer to how he was so smart. Some parts of the brain were thicker than average, which could mean he had a stronger connection between the two hemispheres. In 1947, he co-authored a top-secret paper on what to do if humans contact aliens with J.

What are the 3 laws of Einstein?

I begin the discussion by offering the following three laws: ▸ The laws of physics are identical in all non-accelerating (that is, inertial) frames. ▸ The vacuum speed of light, c, is the same for all inertial frames. ▸ The total energy E of a body of mass m and momentum p is given by E=√m2c4+p2c2.

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Stephen William Hawking CH CBE FRS FRSA (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author who, at the time of his death, was director of research at the Centre for Theoretical Cosmology at the University of Cambridge.[7][17][18] Between 1979 and 2009, he was the Lucasian Professor of Mathematics at the University of Cambridge, widely viewed as one of the most prestigious academic posts in the world.[19]

Hawking was born in Oxford into a family of physicians. In October 1959, at the age of 17, he began his university education at University College, Oxford, where he received a first-class BA degree in physics. In October 1962, he began his graduate work at Trinity Hall at the University of Cambridge where, in March 1966, he obtained his PhD degree in applied mathematics and theoretical physics, specialising in general relativity and cosmology. In 1963, at age 21, Hawking was diagnosed with an early-onset slow-progressing form of motor neurone disease that gradually, over decades, paralysed him.[20][21] After the loss of his speech, he communicated through a speech-generating device initially through use of a handheld switch, and eventually by using a single cheek muscle.[22]

Hawking's scientific works included a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity, and the theoretical prediction that black holes emit radiation, often called Hawking radiation. Initially, Hawking radiation was controversial. By the late 1970s and following the publication of further research, the discovery was widely accepted as a major breakthrough in theoretical physics. Hawking was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. He was a vigorous supporter of the many-worlds interpretation of quantum mechanics.[23][24]

Hawking achieved commercial success with several works of popular science in which he discussed his theories and cosmology in general. His book A Brief History of Time appeared on the Sunday Times bestseller list for a record-breaking 237 weeks. Hawking was a Fellow of the Royal Society, a lifetime member of the Pontifical Academy of Sciences, and a recipient of the Presidential Medal of Freedom, the highest civilian award in the United States. In 2002, Hawking was ranked number 25 in the BBC's poll of the 100 Greatest Britons. He died in 2018 at the age of 76, after living with motor neurone disease for more than 50 years.

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Helen Adams Keller was an American author, disability rights advocate, political activist and lecturer. Born in West Tuscumbia, Alabama, she lost her sight and hearing after a bout of illness at the age of nineteen months.

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In the early 20th century, Charles Steinmetz could be seen pedaling his bicycle down the streets of Schenectady, New York, in a suit and top hat, or floating down the Mohawk River in a canoe, kneeling over a makeshift desktop, where he passed hours scribbling notes and equations on papers that sometimes blew into the water. With a Blackstone panatela cigar seemingly glued to his lips, Steinmetz cringed as children scurried away upon seeing him—frightened, he believed, by the “queer, gnome-like figure” with the German accent. Such occurrences were all the more painful for Steinmetz, as it was a family and children that he longed for most in his life. But knowing that his deformity was congenital (both his father and grandfather were afflicted with kyphosis, an abnormal curvature of the upper spine), Steinmetz chose not to marry, fearful of passing on his deformity. Born in 1865 in Breslau, Germany (now Wroclaw, Poland), Carl August Rudolph Steinmetz became a brilliant student of mathematics and chemistry at the University of Breslau, but he was forced to flee the country after the authorities became interested in his involvement with the Socialist Party. He arrived at Ellis Island in 1888 and was nearly turned away because he was a dwarf, but an American friend whom Steinmetz was traveling with convinced immigration officials that the young German Ph.D. was a genius whose presence would someday benefit all of America. In just a few years, Steinmetz would prove his American friend right. Soon after his arrival, he went to work for Eickemeyer and Osterheld, a company in Yonkers, New York, and he identified and explained, through a mathematical equation that later became known as the Law of Hysterisis, or Steinmetz’s Law, phenomena governing power losses, leading to breakthroughs in both alternating- and direct-current electrical systems. America was entering a golden age of electrical engineering, and when Thomas Edison and General Electric learned what Steinmetz was doing with electric motors in Yonkers, the company bought out Eickemeyer and Osterheld in 1892, acquiring all of Steinmetz’s patents as well as his services. Steinmetz Americanized his name to Charles Steinmetz. He chose Proteus as his middle name-the nickname his professors in Germany had affectionately bestowed upon him in recognition of the shape-shifting sea god. In Greek mythology, Proteus was a cave-dwelling prophetic old man who always returned to his human form-that of a hunchback. Steinmetz thoroughly enjoyed the comparison. In 1894 he arrived in Schenectady, the place he would call home for the next thirty years, and his impact at General Electric was immediate. Using complex mathematical equations, Steinmetz developed ways to analyze values in alternating current circuits. His discoveries changed the way engineers thought about circuits and machines and made him the most recognized name in electricity for decades. Before long, the greatest scientific minds of the time were traveling to Schenectady to meet with the prolific “little giant”; anecdotal tales of these meetings are still told in engineering classes today. One appeared on the letters page of Life magazine in 1965, after the magazine had printed a story on Steinmetz. Jack B. Scott wrote in to tell of his father’s encounter with the Wizard of Schenectady at Henry Ford’s River Rouge plant in Dearborn, Michigan. Ford, whose electrical engineers couldn’t solve some problems they were having with a gigantic generator, called Steinmetz in to the plant. Upon arriving, Steinmetz rejected all assistance and asked only for a notebook, pencil and cot. According to Scott, Steinmetz listened to the generator and scribbled computations on the notepad for two straight days and nights. On the second night, he asked for a ladder, climbed up the generator and made a chalk mark on its side. Then he told Ford’s skeptical engineers to remove a plate at the mark and replace sixteen windings from the field coil. They did, and the generator performed to perfection. Ford, whose electrical engineers couldn’t solve some problems they were having with a gigantic generator, called Steinmetz in to the plant. Upon arriving, Steinmetz rejected all assistance and asked only for a notebook, pencil and cot. According to Scott, Steinmetz listened to the generator and scribbled computations on the notepad for two straight days and nights. On the second night, he asked for a ladder, climbed up the generator and made a chalk mark on its side. Then he told Ford’s skeptical engineers to remove a plate at the mark and replace sixteen windings from the field coil. They did, and the generator performed to perfection. Henry Ford was thrilled until he got an invoice from General Electric in the amount of $10,000. Ford acknowledged Steinmetz’s success but balked at the figure. He asked for an itemized bill. Steinmetz, Scott wrote, responded personally to Ford’s request with the following: Making chalk mark on generator $1. Knowing where to make mark $9,999. Ford paid the bill.

Despite his professional successes, there was emptiness in Steinmetz’s life, which he rectified with a maneuver that helped secure his reputation as the “Bohemian scientist.” He spent his first few years in Schenectady in a “bachelor circle” of GE engineers, hiking, canoeing and experimenting with photography. Steinmetz became close friends with one of lab assistants, a thin, young blond man named Joseph LeRoy Hayden, as they developed the first magnetic arc lamp, later used to light street corners. Hayden began to cook for Steinmetz, and soon had a cot placed in his boss’s laboratory so he could nap during their marathon working hours. When Hayden announced that he intended to marry and find an apartment nearby, Steinmetz had an idea. By the turn of the twentieth century, Steinmetz had started construction on a large house on Wendell Avenue, in the area where GE executives lived. A collector of rare plants, he had it designed with a greenhouse, as well as a laboratory, where he planned to work as much as possible to avoid going into the office. Once the mansion was finished, Steinmetz filled the greenhouse with orchids, ferns and cacti (he delighted in their strange shapes) and focused on the menagerie of animals he had always wanted. Like a mischievous boy, he was fascinated with anything that was lethal, and he gathered alligators, rattlesnakes and black widow spiders. The inventor Guglielmo Marconi once asked about Steinmetz about his Gila monster. “He’s dead,” Steinmetz replied. “He was too lazy to eat.” Soon, Steinmetz was dining each night in his home with Hayden and his wife, Corrine, a stout, round-faced French-Canadian. The house was too large for Steinmetz, and the Haydens suspected what might be coming. Finally, Steinmetz turned to Corinne. “Why don’t you come and live with me?” he asked. Joseph Hayden was all for it. It would make their long working hours more convenient, and the house offered space he and Corrine could never afford on their own. Hayden had come to cherish Steinmetz’s eccentricities, and he understood that the Bohemian scientist really yearned for a family of his own. Corrine was reluctant, but Steinmetz gently wore her down. “If we move in with you,” she eventually told him, “I must run the house as I see fit.” “Of course, my dear,” Steinmetz replied, stifling a huge grin. Corrine Hayden then outlined the terms of their cohabitation—Steinmetz would pay only for his share of expenditures. She would prepare and served meals on a regular schedule, no matter how important his and her husband’s work was. The men would simply have to drop everything and sit down to the table. Steinmetz agreed to all of Corrine’s terms. The living arrangement, despite some awkward starts, soon flourished, especially after the Haydens began to have children—Joe, Midge and Billy—and Steinmetz legally adopted Joseph Hayden as his son. The Hayden children had a grandfather, “Daddy” Steinmetz, who ensured that they grew up in a household filled with wonder. Birthday parties included liquids and gasses exploding in Bunsen burners scattered decoratively around the house. Not much taller than the children who ran about his laboratory and greenhouse, Steinmetz entertained them with stories of dragons and goblins, which he illustrated with fireworks he summoned from various mixtures of sodium and hydrogen in pails of water. In 1922, Thomas Edison came to visit Steinmetz. By then, Edison was nearly deaf, and Steinmetz tapped out a message on Edison’s knee in Morse code. Edison beamed, and the two continued their silent conversation in front of bewildered reporters. Steinmetz’s fame only grew in the years he lived with the Haydens on Wendell Avenue. When a Socialist mayor took office, Steinmetz served as president of the Schenectady Board of Education and was instrumental in implementing longer school hours, school meals, school nurses, special classes for children of immigrants and the distribution of free textbooks. One Friday afternoon in 1921, Steinmetz hopped in his electric car and headed off for a weekend at Camp Mohawk, where he’d built a small house overlooking Viele Creek. When he arrived he’d discovered that lightning had damaged the building and shattered a large silver glass mirror. He spent the entire weekend painstakingly reconstructing the mirror, placing the slivers between two panes of glass. Once assembled, he studied the pattern and was convinced that the shattered mirror revealed the lightning’s path of electrical discharge. Back at General Electric, he brought in a gigantic apparatus, then another. There were thunderous crashes at odd hours of the night. The city was abuzz with speculation. What exactly was the Wizard of Schenectady doing in Building 28?

In March of 1922, reporters were invited to General Electric and gathered before a model village that Steinmetz had constructed. In a noisy and explosive demonstration witnessed by Edison himself, Steinmetz unveiled a 120,000-volt lightning generator. With a showman’s flourish, he flipped a switch and produced lighting bolts that splintered large blocks of wood, decimated the steeple on a white chapel and split a miniature tree. Reporters were awestruck. The following day, a headline in the New York Times proclaimed, “Modern Jove Hurls Lighting at Will.” Steinmetz’s work led to the measures used to protect power equipment from lightning strikes. But toward the end of Steinmetz’s life, according to his biographer, Jonathan Norton Leonard, “his scientific work had become rather like a boy’s playing with machinery.” He had by then earned the respect of electrical engineers for his contributions to the field, but Steinmetz, at the peak of his celebrity, simply could not help but delighting in the kind of pseudo-science he would have scorned earlier in his career. Proteus was as happy as he’d ever been in his life. In the fall of 1923, Steinmetz and his family traveled west by train, stopping to see the Grand Canyon, Yosemite and the actor Douglas Fairbanks in Hollywood. The trip exhausted the 58-year-old scientist, and on October 26, back in his home on Wendell Avenue, his grandson Billy brought him breakfast on a tray, only to observe Steinmetz lying motionless on his bed, a physics book by his side. In his sleep, doctors said, his heart had failed. The Wizard of Schenectady was gone. Thanks so much for this info from smithsonianmag.com! And if you made it this far, thanks for reading!

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Burkhard Heim (German: [haɪm]; 9 February 1925 – 14 January 2001) was a German theoretical physicist. He devoted a large portion of his life to the pursuit of his unified field theory, Heim theory.[1] One of his childhood ambitions was to develop a method of space travel, which contributed to his motivation to find such a theory.[2]

During World War II, Heim was conscripted into the air force. However, a previous essay about explosives led to his working briefly in a chemical laboratory as an explosives technician, instead. An explosion in the laboratory caused by the mishandling of unstable compounds left him with debilitating handicaps. The accident left him without hands and mostly deaf and blind when he was 19, forcing him to use Krukenberg hands. Illobrand von Ludwiger claims this to be a terrorist assassination attempt, for which Heim saved the assassins life by "forgiving him".[1] Neither name nor motivation of the claimed assassin nor details of the "forgiving" and how this saved his life are given.

His behavior subsequently became progressively eccentric and reclusive.[1] Eventually, he retreated into almost total seclusion, concentrating on developing and refining his theory of everything.
His achievements:

A large proportion of the 76 years of Heim's life was spent on theoretical physics and the formulation of his Heim theory.[2]

1940s[edit]

In 1943 Heim met Heisenberg, who was involved in German atom bomb research at that time, and told him of his plan to use chemical implosion to facilitate an atomic explosion. This design was based on his idea he developed for a 'clean' hydrogen bomb when he was 18. Heisenberg was impressed by Heim's knowledge, but thought the approach would be impractical.[1]

At that point Heim had to do military service in the German air force. He sent a paper on explosives to the Chemical-Technical 'Reichsanstalt' in Berlin, whereupon he was summoned to work there on the development of the proposed new explosives. It was here that he met with the accident that handicapped him for life.[1]

In 1946, Heim registered at the University of Göttingen to study physics. He fulfilled his academic degree requirements with the help of companions. Afterwards, he continued to study a variety of topics including medicine, psychology, electronics, history and theology.[1][2]

1950s[edit]

In 1952, during the third congressional session of the International Astronautical Federation (IAF) in Stuttgart, Germany, Burkhard Heim presented his theory for interplanetary propulsion under the title of “Die dynamische Kontrabarie als Lösung des astronautischen Problems” (The Dynamic Kontrabarie as solution of the Astronautical Problem).[3] It was the first time the idea of gravitational, electromagnetic, weak, and strong forces were treated as distortions of their proper Euclidean metrics in a higher-dimensional space.[4] A brief description of Heim's lecture was recorded in the proceedings of the Society for Space Research.[5][6]

In 1954 he began to study under Carl Friedrich von Weizsäcker in Göttingen.[1] He wrote his diploma thesis on physical processes in the Crab Nebula Supernova. After this, he began to work at the Max Planck Institute for Astrophysics in Göttingen. However, he soon found it extremely difficult to work in a team due to his handicaps. Von Weizsäcker also did not want to burden Heim with the development of a unified field theory. However, this was essentially his primary interest.[1]

Also, his second IAF presentation was given in 1954, Innsbruck, Austria, during its fifth congress. News about his presentations may have been relayed to the United States by the American representatives, Frederick C. Durant III and Andrew G. Haley, who were serving as President and Vice President, respectively, of the IAF during its fifth congress.[7][8]

During the 1955 holiday week of Thanksgiving Day, the New York Herald Tribune, and The Miami Herald carried announcements about the completion of contractual arrangements between Burkhard Heim and Glenn L. Martin Company. Heim was to assist them with their gravity control propulsion project.[9][10] The news about Heim's contract was among several revelations that had been published during the period of intensified United States gravity control propulsion research (1955 - 1974).[9]

In 1956, Heim completed a 27-page progress report. Copies of it and its English translation were archived at the Gravity Research Foundation.[11] It had summarized his philosophy (syntrometry) and his theory (Principle of Dynamic Contrabarie) for coupling general relativity with quantum dynamics for propulsion applications.[12] Sample calculations for an expedition from the surface of the Earth to the surface of the planet Mars appeared at the end of Heim's progress report. His six-dimensional meso-field-equations required only 285 kg of fuel to be expended to propel a manned vehicle, with the empty weight of fifty tons, on a round trip lasting only 336 hours. Those calculations allowed 111 hours for interplanetary travel, 100 hours to explore Mars, and fourteen hours to perform engine overhaul and launch preparations. His endothermic process required a maximum cooling rate of 1.2 GW.[11]

In November 1957, Heim delivered a lecture about his propulsion theory to the Deutschen Gesellschaft für Raketentechnik und Raumfahrt (German Society for Rocket Technology and Space Travel), Frankfurt.[1] Subsequently, Wernher von Braun sought his comments on various aerospace projects.[2] According to von Ludwiger, an audiotape of Heim's presentation had been prepared for shipment to America.[1]

In 1959, Heim completed his first publication in the obscure German journal Zeitschrift für Flugkörper (Magazine for Missiles).[13] It carried a series of four articles about his theory.[14][15][16][17] The series of papers carried claims and sample calculations that were similar to his 1956 progress report at the Gravity Research Foundation. Heim discussed "the principle of the dynamic Kontrabarie" in which he examined how a field drive would be more effective than the best chemical drive for rockets. These papers remained ambiguous on the fundamental concepts underlying his theory of the field drive, likely due to the necessity to complete the calculations on the extra fields of his field theory. These calculations were not performed until a few years later.[14]

Heim was very mindful of keeping his work from others and worried about plagiarism.[1] In particular, he saw some colleagues as possible plagiarists. One other reason for his distrust of others was due to a colleague who embezzled donations from a society he founded in 1959. (The Institut für Kraftfeldphysik e.V. was intended to develop test models of his propulsion concepts.)[1]

Heim stopped work on the propulsion aspect of his theory in 1959. Neither failures nor flaws had made Heim discontinue his propulsion research – it was the unbridled interest of unsavory firms.[14] The preface by Helmut Goeckel to Heim's first paper in the series of four articles published by Magazine for Missiles indicated various aerospace and ordnance companies had made several attempts to kidnap him. Subsequently, the remainder of his life was devoted to refining the unified field attributes of his theory.[2]

1960s[edit]

In the late 1950s and early 1960s there were a number of reports on Heim in magazines and tabloids such as Le Figaro, Bunte Illustrierte, Quick and Stern. The magazine le Figaro remarked, on 15 January 1969, that he was an "inhuman robot".[1] Also, the main German TV station, ARD, ran reports and interviews with Heim. It was speculated that Heim was likely to make a breakthrough, either in fundamental physics or propulsion theory.

On 17 November 1969 Heim reported the progress he had made towards developing his unified field theory to Messerschmitt-Bölkow-Blohm (MBB). Pascual Jordan and Gebhard Lyra were among the small body of scientists who attended that colloquium. Jordan wrote Heim a letter on 22 December 1969 encouraging him to publish his theory.[1]

1970s[edit]

Ludwig Bölkow encouraged Heim to enhance his theory.[2] On 25 November 1976 Heim publicly introduced, for the first time, his completed unified field theory in a presentation to MBB engineers.[18] It included the methodology for calculating the mass spectrum of elementary particles. Pursuant to recommendations by Werner Heisenberg’s successor, Hans-Peter Dürr, Heim published his unified field theory summary, the following year, in an article entitled Recommendations of a Way to a Unified Description of Elementary Particles in the Max Planck Institute journal Zeitschrift für Naturforschung.[19] This was the first publication of his theory in a peer reviewed scientific journal.

1980s[edit]

In 1982 Heim's mass formula was programmed on a computer at the German Electron Synchrotron DESY in Hamburg with the assistance of some resident scientists.[2] Up to that point, Heim had not yet confided in other theoretical physicists on the details of the mass formula derivation. Hence, the DESY results were not widely published and disseminated for academic scrutiny. That year Walter Dröscher, a theorist at the Vienna Patent Office, began to work with Heim. The first result of their collaboration cumulated in the second volume of Heim's major work, appearing in 1984.[2]

1990s[edit]

In 1992, Hans Theodor Auerbach and Illobrand von Ludwiger presented a summary of Heim's unified field theory of elementary particles and their internal structures. It contained Heim's derivation of Sommerfeld's fine structure constant (α− = 1/137.0360085) – it was a close approximation of the 1987 measured value (α = 1/137.035989).[20]

2000s[edit]

Heim died in Northeim in 2001 at age 75.

In 2004, the American Institute of Aeronautics and Astronautics (AIAA) awarded the winning paper in the nuclear and future flight field to a retired Austrian patent officer named Walter Dröscher and Jochem Häuser, a physicist and professor of computer science at the University of Applied Sciences in Salzgitter, Germany. They turned the theoretical framework of Burkhard Heim into a proposal for an experimental test for a propulsion device that is thought to theoretically be able to travel at rates faster than the speed of light. Hans Theodor Auerbach, a theoretical physicist and someone who has worked alongside Heim has stated that, "As far as I understand it, Heim theory is ingenious," and, "I think that physics will take this direction in the future".[2][21]

In 2008, the AIAA Nuclear and Future Flight Propulsion Technical Committee published the following statement:

Much research was conducted this year on the investigation of the experimental basis of the existence of gravity-like fields that cannot be described by conventional gravitation; that is, by the accumulation of mass. Investigations emphasized a geometrized approach termed Extended Heim Theory, which extends Einstein's idea of geometrization of physics by employing the additional concepts of Heim.[22]

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Mary Temple Grandin was born in Boston, Massachusetts, into a very wealthy family. One of the employees of the family was also named Mary, so Grandin was referred to by her middle name, Temple, to avoid confusion.[3] Her mother is Anna Eustacia Purves (now Cutler), an actress, singer, and granddaughter of John Coleman Purves (co-inventor for the autopilot aviation system). She also has a degree in English from Harvard University.[4] Her father was Richard McCurdy Grandin,[5][6] a real estate agent and heir to the largest corporate wheat farm business in America at the time, Grandin Farms.[7] Grandin's parents divorced when she was 15, and her mother eventually went on to marry Ben Cutler, a renowned New York saxophonist,[8] in 1965, when Grandin was 18 years old. Her father, Richard Grandin, died in California in 1993.

Grandin has three younger siblings: two sisters and a brother. Grandin has described one of her sisters as being dyslexic. Her younger sister is an artist, her other sister is a sculptor, and her brother is a banker.[7][9] John Livingston Grandin (Temple's paternal great-grandfather) and his brother William James Grandin, were French Huguenots who drilled for oil. He intended to cut a deal with John D. Rockefeller in a meeting, but the latter kept him waiting too long so he walked out before Rockefeller arrived. Then the brothers went into banking and when Jay Cooke's firm collapsed they received thousands of acres of undeveloped land in North Dakota as debt collateral. They set up wheat farming in the Red River Valley and housed the workers in dormitories. The town of Grandin, North Dakota, is named after John Livingston Grandin.[4][10]

Although raised in the Episcopal Church, early on Temple Grandin gave up on a belief in a personal deity or intention in favor of what she considers a more scientific perspective.[11]

Diagnosis

Grandin was not formally diagnosed with autism until her adulthood. As a two-year-old, the only formal diagnosis given to Grandin was "brain damage",[12][13] a finding finally dismissed through cerebral imaging at the University of Utah by the time she turned 63 in 2010.[14] While Grandin was still in her mid-teens, her mother chanced upon a diagnostic checklist for autism. After reviewing the checklist, Grandin's mother hypothesised that Grandin's symptoms were best explained by the disorder and was later determined to be an autistic savant.[12][15][16][17][18]

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Stephen William Hawking CH CBE FRS FRSA (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author who, at the time of his death, was director of research at the Centre for Theoretical Cosmology at the University of Cambridge.[17][18][7] Between 1979 and 2009 he was the Lucasian Professor of Mathematics at the University of Cambridge.

Hawking was born in Oxford, into a family of physicians. In October 1959, at the age of 17, he began his university education at University College, Oxford, where he received a first-class BA degree in physics. In October 1962 he began his graduate work at Trinity Hall, Cambridge, where in March 1966 he obtained his PhD degree in applied mathematics and theoretical physics, specialising in general relativity and cosmology. In 1963 Hawking was diagnosed with an early-onset slow-progressing form of motor neurone disease (amyotrophic lateral sclerosis – ALS, for short) that gradually, over the decades, paralysed him.[19][20] After the loss of his speech, he communicated through a speech-generating device initially through use of a handheld switch, and eventually by using a single cheek muscle.[21]

Hawking's scientific works included a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity, and the theoretical prediction that black holes emit radiation, often called Hawking radiation. Initially, Hawking radiation was controversial. By the late 1970s and following the publication of further research, the discovery was widely accepted as a major breakthrough in theoretical physics. Hawking was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. He was a vigorous supporter of the many-worlds interpretation of quantum mechanics.[22][23]

Hawking achieved commercial success with several works of popular science in which he discussed his theories and cosmology in general. His book A Brief History of Time appeared on the Sunday Times bestseller list for a record-breaking 237 weeks. Hawking was a Fellow of the Royal Society, a lifetime member of the Pontifical Academy of Sciences, and a recipient of the Presidential Medal of Freedom, the highest civilian award in the United States. In 2002, Hawking was ranked number 25 in the BBC's poll of the 100 Greatest Britons. He died on 14 March 2018 at the age of 76, after living with motor neurone disease for more than 50 years.

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She was an American author, disability rights advocate, political activist and lecturer. Born in West Tuscumbia, Alabama, she lost her sight and hearing after a bout of illness at the age of nineteen months. She died June 1, 1968, and was born June 27, 1880.

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He was born in Moscow, the son of Alexander Lefschetz and his wife Sarah or Vera Lifschitz, Jewish traders who used to travel around Europe and the Middle East (they held Ottoman passports)[citation needed]. Shortly thereafter, the family moved to Paris. He was educated there in engineering at the École Centrale Paris, but emigrated to the US in 1905.

He was badly injured in an industrial accident in 1907, losing both hands.[6] He moved towards mathematics, receiving a Ph.D. in algebraic geometry from Clark University in Worcester, Massachusetts in 1911.[7] He then took positions in University of Nebraska and University of Kansas, moving to Princeton University in 1924, where he was soon given a permanent position. He remained there until 1953.

In the application of topology to algebraic geometry, he followed the work of Charles Émile Picard, whom he had heard lecture in Paris at the École Centrale Paris. He proved theorems on the topology of hyperplane sections of algebraic varieties, which provide a basic inductive tool (these are now seen as allied to Morse theory, though a Lefschetz pencil of hyperplane sections is a more subtle system than a Morse function because hyperplanes intersect each other). The Picard–Lefschetz formula in the theory of vanishing cycles is a basic tool relating the degeneration of families of varieties with 'loss' of topology, to monodromy. He was an Invited Speaker of the ICM in 1920 in Strasbourg.[8] His book L'analysis situs et la géométrie algébrique from 1924, though opaque foundationally given the current technical state of homology theory, was in the long term very influential (one could say that it was one of the sources for the eventual proof of the Weil conjectures, through SGA 7 also for the study of Picard groups of Zariski surface). In 1924 he was awarded the Bôcher Memorial Prize for his work in mathematical analysis.

The Lefschetz fixed-point theorem, now a basic result of topology, was developed by him in papers from 1923 to 1927, initially for manifolds. Later, with the rise of cohomology theory in the 1930s, he contributed to the intersection number approach (that is, in cohomological terms, the ring structure) via the cup product and duality on manifolds. His work on topology was summed up in his monograph Algebraic Topology (1942). From 1944 he worked on differential equations.

He was editor of the Annals of Mathematics from 1928 to 1958. During this time, the Annals became an increasingly well-known and respected journal, and Lefschetz played an important role in this.[9]

In 1945 he travelled to Mexico for the first time, where he joined the Institute of Mathematics at the National University of Mexico as a visiting professor. He visited frequently for long periods, and during 1953–1966 he spent most of his winters in Mexico City.[9] He played an important role in the foundation of mathematics in Mexico, and sent several students back to Princeton. His students included Emilio Lluis, José Adem, Samuel Gitler, Santiago López de Medrano, Francisco Javier González-Acuña and Alberto Verjovsky.[2]

Lefschetz came out of retirement in 1958, because of the launch of Sputnik, to augment the mathematical component of Glenn L. Martin Company's Research Institute for Advanced Studies (RIAS) in Baltimore, Maryland. His team became the world's largest group of mathematicians devoted to research in nonlinear differential equations.[10] The RIAS mathematics group stimulated the growth of nonlinear differential equations through conferences and publications. He left RIAS in 1964 to form the Lefschetz Center for Dynamical Systems at Brown University, Providence, Rhode Island.[11]

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John Dalton (1766-1844) was an English chemist, physicist, and meteorologist, best known for introducing the atomic theory into chemistry and for his work on human optics. Inspired by his own unusual perception of colour, he conducted the first ever research into colour blindness – a subject which subsequently became known as Daltonism.

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Temple Grandin was diagnosed with autism as a child and went on to pursue work in psychology and animal science. She has become a leading advocate for autistic communities and has also written books and provided consultation on the humane treatment of animals. - Mr. Whiteaker