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Polonium...
Discovered in 1898, the radioactive element Polonium was the cause of death of Yasser Arafat, the Palestinian leader and Russian dissident. Polonium is amongst the deadliest poisons of the 21st century. It has no use in biological science since it is extremely lethal to all living organisms. Its most common form is Polonium 210, which is allegedly 250,000 times more deadly than hydrogen cyanide. This explains why the Americans employed its toxicity in the World War II to bring down Nagasaki in what they called the Manhattan Project's Dayton Project. In theory, a gram of Polonium 210 could wipe out 10 million people if ingested, injected or inhaled. If the radiation doesn’t kill you, then you are likely to get cancer.

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A ghost or other supernatural being supposedly responsible for physical disturbances such as making loud noises and throwing objects about.

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Truly Shocking & Horrifying Moments Caught on Camera

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10 of the Freakiest Alleged Poltergeists Caught on Video

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Uh oh, ghost footage; get ready for some horrible quality cameras. From plates being thrown off tables, to shopping carts pushing themselves, here are 10 of the freakiest and most intriguing alleged poltergeists caught on video that I could find. Want to follow me on Twitter? https://twitter.com/mista_nightmare

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Much like our veins appear blue, it has everything to do with wavelengths and blue light Blue light scatters more than the other colors in the spectrum because it travels as shorter, smaller waves.

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It looks like a vegetable, but it's classified as a fruit. Or is it the other way around? The tomato is technically a fruit since it protects and contains the seeds of its plant, but according to a Supreme court ruling, is is classified as a vegetable.

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Ghosts are a particular manifestation of a belief in life after death. Though the specifics vary among groups, a ghost is generally understood to be the disembodied spirit or soul of a once-living person. Sometimes the spirit belongs to a deceased animal.
A ghost is said to linger on earth when the person died in a traumatic way, or when his burial ritual was disturbed before it was complete, or sometimes just because the spirit feels like it. Pesky or disruptive ghosts are called poltergeists. Some groups believe that ghosts are actually demons, or evil angels.
Not all belief systems around the world allow for spirits or souls that linger on earth after death, but some do. In fact, many do. The concept is popular in spiritualist circles and many Christian faiths as well. With so many theologies that allow for an immediate spiritual life after death, it is no wonder that ghosts are so popular.

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Real Life Ghost Attack Videos Caught On Camera

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Are Ghosts Real? Well we answer that question in this video. What do you think? Are Ghosts Real? Subscribe: http://bit.ly/2bvLD6e VIDEO CONCEPT: Landon Dowlatsingh - http://bit.ly/2bwFVhQ VOICE ACTOR: Rebecca Felgate- http://bit.ly/2c3LL8O SCRIPTED BY: Rebecca Felgate- http://bit.ly/2c3LL8O VIDEO EDITED BY: Dylan Lamovsek- https://twitter.com/uptownduck00 PRODUCED BY: Liam Collens- https://www.instagram.com/liam.collens/

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22-year old Elizabeth Short was very active at promoting herself into showbiz at the time the Black Dahlia murder occurred, however, no one knew of the killer or who actually did the murder."The Black Dahlia" was a nickname given to Elizabeth Short an American woman who was the victim of a much-publicized murder in 1947. Short acquired the moniker posthumously from newspapers in the habit of nicknaming crimes they found particularly lurid. The "Black Dahlia" nickname may have been derived from a film noir murder mystery, The Blue Dahlia, released in April 1946. Short was found mutilated, her body sliced in half at the waist, on January 15, 1947, in Leimert Park, Los Angeles, California. Short's unsolved murder has been the source of widespread speculation, leading to many suspects, along with several books, television and film adaptations of the story. Short's murder is one of the oldest unsolved murder cases in Los Angeles history.

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For ages, people have been hearing about the Loch Ness monster and how it baffled everyone thinking that it is a creature unlike any other. There have been many sightings over the years and photos and videos of actual footage have been checked and looked at time and time again, confirming if it could be some kind of sea serpent or a descendant of the dinosaurs. Even up today, as some are claiming, it still exists and swims under the waters.

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Is there extraterrestrial life in the universe ? 

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Is there extraterrestrial life in the universe ? 

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At the moment, life on Earth is the only known life in the universe, but there are compelling arguments to suggest we are not alone. Indeed, most astrophysicists accept a high probability of there being life elsewhere in the universe, if not on other planets or on moons within our own solar system.

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Commander: Rick D. Husband, a U.S. Air Force colonel and mechanical engineer, who piloted a previous shuttle during the first docking with the International Space Station (STS-96).

Pilot: William C. McCool, a U.S. Navy commander.

Payload Commander: Michael P. Anderson, a U.S. Air Force lieutenant colonel, physicist, and mission specialist who was in charge of the science mission.

Payload specialist: Ilan Ramon, a colonel in the Israeli Air Force and the first Israeli astronaut.

Mission Specialist: Kalpana Chawla, an Indian-born aerospace engineer who was on her second space mission.

Mission Specialist: David M. Brown, a U.S. Navy captain trained as an aviator and flight surgeon. Brown worked on scientific experiments.

Mission Specialist: Laurel Blair Salton Clark, a U.S. Navy captain and flight surgeon. Clark worked on biological experiments.

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Reaction between sodium hydroxide and hydrochloric acid...

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Reaction between sodium hydroxide and hydrochloric acid...

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HCl + NaOH = NaCl + H2O
This is a neutralization reaction that produces a salt called sodium chloride (table salt) and water.

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2 H2O2 → 2 H2O + O2

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In general, to balance an equation, here are the things we need to do: Count the atoms of each element in the reactants and the products. Use coefficients; place them in front of the compounds as needed.

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Balancing chemical equations | Chemical reactions and stoichiometry | Chemistry | Khan Academy

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NASA's Kepler Discovers First Earth-Size Planet In The 'Habitable Zone' of Another Star

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NASA's Kepler Discovers First Earth-Size Planet In The 'Habitable Zone' of Another Star

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NASA's Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting a star in the "habitable zone" -- the range of distance from a star where liquid water might pool on the surface of an orbiting planet. The discovery of Kepler-186f confirms that planets the size of Earth exist in the habitable zone of stars other than our sun.

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mach 1 = 1062 km/h

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Light travels at a considerably higher speed than sound . Light travels at a constant speed of 186,000 miles per second, but the speed of sound is only 761.2 mph.

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Is it stress that turns our hair gray  ?

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Is it stress that turns our hair gray  ?

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Ask Smithsonian: Does Stress Turn Your Hair Gray?

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Take a calming breath, then watch this video to find out

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When we go gray, our bodies are bleaching our hair from the inside out.

Everyone's body makes hydrogen peroxide naturally. The buildup eventually gets so colossal that it blocks the melanin -- your body's natural hair dye. Without that melanin, the hairs turn gray, then eventually white. And just like that, we're old.

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Why Does Hair Turn Gray with Old Age? Click here to see more videos: http://www.m301.me/lifenoggin Life Noggin is a weekly animated educational series. Whether it's science, pop culture, history or art, we explore it all and have a ton of fun doing it. Follow Us!

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Practice always makes perfect. In general, to balance an equation, here are the things we need to do: Count the atoms of each element in the reactants and the products. Use coefficients; place them in front of the compounds as needed.

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In dry air at 20 degrees Celsius, the speed of sound is 340.3 m/s .The speed represented by mach 1 is not a constant; for example, it is mostly dependent on temperature.

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Please Subscribe! http://testu.be/1HV4rBv Check out more TestTube 101: http://testu.be/1fu2C5s The rocket-powered X-15 flies at an astounding 4,520 miles per hour. That's MACH 6.04 or 6 times over the speed of sound! Crazy!

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To measure the rate of oxygen gas production ...

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To measure the rate of oxygen gas production ...

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To use a standard solution of sodium hydroxide to distinguish between 2 samples of hydrochloric acid of different concentrations ...

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To use a standard solution of sodium hydroxide to distinguish between 2 samples of hydrochloric acid of different concentrations ...

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On Feb. 1, 2003, space shuttle Columbia broke up as it returned to Earth, killing the seven astronauts on board. NASA suspended space shuttle flights for more than two years as it investigated the disaster.
An investigation board determined that a large piece of foam fell from the shuttle's external tank and fatally breached the spacecraft wing. This problem with foam had been known for years, and NASA came under intense scrutiny in Congress and in the media for allowing the situation to continue.

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Inside Mission Control During STS-107 Columbia

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NASA Gives Graphic Details of Columbia Deaths

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RARE! Space shuttle Columbia Explosion footage

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On February 1st, 2003, the space shuttle Columbia disintegrated during its re-entry into the atmosphere. The seven astronauts were killed. 82 seconds after the launch of shuttle (STS-107), a sizable piece of foam struck the leading edge of Columbia's left wing, at a speed between 650 and 950 km/h, making a hole in the protective tiles made of reinforced carbon-carbon (RCC), close to the landing gear area.

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The Columbia was a NASA space shuttle which was used for space missions. it launched for the last time on January 16th 2003.

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Why do things vanish in the Bermuda triangle ?

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Why do things vanish in the Bermuda triangle ?

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Over the last few centuries, it’s thought that dozens of ships and planes have disappeared under mysterious circumstances in the area, earning it the nickname “The Devil’s Triangle.” People have even gone so far as to speculate that it’s an area of extra-terrestrial activity or that there is some bizarre natural scientific cause for the region to be hazardous; but most likely, it’s simply an area in which people have experienced a lot of bad luck—the idea of it being a “vortex of doom” is no more real than Bigfoot or the Loch Ness Monster

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Terrifying & Mysterious Bermuda Triangle Stories

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