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Beginning of the Solar system (about 4.5 billion years ago)

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Beginning of the Solar system (about 4.5 billion years ago)

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From a vast cloud of gas and dust in our galaxy. The cloud may have disintegrated due to the supernova blast from a nearby exploding star, or supernova. When this dust cloud broke apart, it erupted into a spinning disk of matter known as a solar nebula.

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The solar system was formed within the solar nebula during the Hadean epoch, which eventually gave rise to asteroids, comets, moons, and planets. A planetoid the size of Mars is thought to have collided with the proto-Earth 4.52 billion years ago, according to astrogeophysicists.

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Origin of Earth ( about 4.5 billion years ago)

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Origin of Earth ( about 4.5 billion years ago)

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According to theory, the Earth and the other planets originated from a frozen cloud of gas and dust that was left over after the Sun was formed, 4.5 billion years ago.

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The Hadean, Archean, and Proterozoic eras make up the Precambrian, a broadly defined period of geologic time.

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The second of Earth's four geologic eons, the Archean, lasted from 4,000 to 2,500 million years ago. The Proterozoic Eon followed the Hadean Eon, which came before it. During the Archean Eon, methane droplets in the atmosphere caused a global haze to envelop the infant Earth. There was no oxygen gas on Earth. Water is one of the few substances that contains oxygen.

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The Proterozoic Eon marked the start of the current plate tectonics, which allowed the ancient cores of the continents to wander across huge areas of the earth, gathering smaller bits of crust and occasionally colliding into other enormous land masses. Additionally, the opposite took place, splitting the continent.

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The Huronian Ice Age (2.5 billion years ago)

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The Huronian Ice Age (2.5 billion years ago)

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The Huronian ice age, which was brought on by the saturation of the new gas oxygen in the air and oceans, occurred when the Earth got increasingly colder despite the Sun getting brighter as it aged. Oxygen removed methane from the atmosphere, a greenhouse gas that kept the Earth warm.

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Oxygen in the Atmosphere ( 2.3 billion years ago) 

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Oxygen in the Atmosphere ( 2.3 billion years ago) 

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By the end of the Hadean, its potential is that the continents appeared in the middle of the time period and then disappeared into the deep ocean

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The Appearance of Cyanobacteria (1.9 billion years ago)

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The Appearance of Cyanobacteria (1.9 billion years ago)

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Cyanobacteria may make their own food since they are aquatic and photosynthetic, or live in water. They are usually unicellular and somewhat little because they are bacteria, although they regularly form colonies that are large enough to be observed. Being older than 3.5 billion years old, they have the distinction of being the oldest fossils ever found. One of the most common and significant bacterial groups on Earth, cyanobacteria, are still around, which may surprise you.

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The Appearance of the first Multicellular Organisms ( 1.2 billion years ago)

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The Appearance of the first Multicellular Organisms ( 1.2 billion years ago)

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About 600 million years ago, the first multicellular animals on Earth appeared as simple sponges. The first living things began to rapidly evolve during the Cambrian Explosion, which took place five hundred and 53 million years ago.

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The Appearance of the Fungi (1 billion years ago)

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The Appearance of the Fungi (1 billion years ago)

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Although little is known about the history of fungus in the fossil record, research indicates that they probably first appeared about a billion years ago. As evidenced by the presence of fungal hyphae in the tissues of the oldest plant fossils, fungi are a very old class of organisms.

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The Cryogenian Ice (850-635 million years ago)

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The Cryogenian Ice (850-635 million years ago)

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In the Cryogenian, significant ecological changes took place. The severe Sturtian glaciation began at the beginning of the Cryogenian after the previous Boring Billion years of stability, freezing the entire Earth in what is known as a Snowball Earth, a planetary state. After 70 million years, it came to an end, but the Marinoan glaciation, another significant global occurrence, immediately followed.

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The Snowball Earth (716 million years ago)

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The Snowball Earth (716 million years ago)

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The "snowball Earth" epoch is the name given by scientists to the time when the planet's surface was nearly, if not entirely, frozen. Current ideas suggest that it happened during the Cryogenian Ice Age.

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Creation of the Ozone Layer ( around 600 million years ago)

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Creation of the Ozone Layer ( around 600 million years ago)

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The chemical reactions between nitrogen oxides (NOX) and volatile organic compounds (VOC), often known as hydrocarbons, produce ozone. This reaction can occur both close to the earth and high in the atmosphere.

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The Paleozoic Era is the oldest of the three geologic eras that make up the Phanerozoic Eon. The name "Paleozoic" was coined in 1838 by the British geologist Adam Sedgwick from the Greek terms palaiós and z, "life," which together denote "ancient life."

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The Cambrian Period (540 million years ago)

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The Cambrian Period (540 million years ago)

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The Cambrian Period came before both the Paleozoic Era and the Phanerozoic Eon. The Cambrian Period spanned 53.4 million years, starting at the beginning of the Ordovician Period 485.4 million years ago and ending 538.8 million years earlier.

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The Ordovician Period is the Paleozoic Era's second stage, geologically speaking. The countless marine creatures that made up the Ordovician period famous include graptolites, trilobites, brachiopods, and conodonts.

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The Appearance of invertebrates ( 500 million years ago)

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The Appearance of invertebrates ( 500 million years ago)

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Around 97% of all animals on the planet are invertebrates, invertebrates are an animal lacking a backbone or animals without a spinal cord. The first invertebrates emerged from the sea. As an illustration, Cambrians had soft bodies and a carapace or shell.

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The Appearance of the first plants (470 million years ago)

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The Appearance of the first plants (470 million years ago)

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The earliest terrestrial plants emerged around 470 million years ago, during the Ordovician epoch, when life was rapidly diversifying. They were non-vascular, shallow-rooted plants like mosses and liverworts. The first plants are said to have originated from a type of green water algae.

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The Appearance of the First Vertebrates (450 million years ago)

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The Appearance of the First Vertebrates (450 million years ago)

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Vertebrates appear to have originally evolved in the late Ordovician, about 450 million years ago. Despite the scarcity and incompleteness of the bulk of Ordovician fossil vertebrates, evidence from other fossils suggests the presence of various lineages of armored jawless fish as well as the ancestors of sharks and jawed fish.

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The Appearance of Land Animal (423 million years ago)

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The Appearance of Land Animal (423 million years ago)

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DNA evidence suggests that the first animals originated from these clusters of specialized, cooperating cells approximately 800 million years ago. Living things were allowed to move onto the land once the ozone layer developed and photosynthesis had sufficiently raised air oxygen levels.

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The Devonian Period (416 million years ago)

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The Devonian Period (416 million years ago)

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From the end of the Silurian, 419.2 million years ago, to the start of the Carboniferous, 358.9 million years ago, the Devonian geologic epoch and system of the Paleozoic era lasted for 60.3 million years. It is called for the English county of Devon, where the initial studies of these rocks were conducted.

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The Appearance of Insects (385 million years ago)

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The Appearance of Insects (385 million years ago)

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The majority of the arthropod phylum is made up of them. In addition to a chitinous exoskeleton, insects have a three-part body (head, thorax, and abdomen), three pairs of jointed legs, sophisticated eyes, and one pair of antennae. The oldest insect fossil known to man is a wingless, silverfish-like critter that lived around 385 million years ago.

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The Appearance of Amphibians (363 million years ago)

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The Appearance of Amphibians (363 million years ago)

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Depending on the species, they could have stripes or dots on their skin. They also have scars behind their eyes covering the eardrums. Toads, on the other hand, have shorter legs. They have warts and a stern appearance. Ichthyostega, one of the earliest basic amphibians, has more efficient lungs and nostrils. It had a head that was strikingly similar to a lobe-finned fish's, four powerful legs, a neck, a finned tail, and all of these features.

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The Carboniferous Period (360 million years ago)

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The Carboniferous Period (360 million years ago)

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The Carboniferous Period ran from 359.2 to 299 million years ago*, toward the end of the Paleozoic Era. The term "Carboniferous" first originated in England in reference to the nation's rich coal reserves. Midwestern and eastern North America, northern Europe, Asia, and Asia all have these coal resources.

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The Karoo Ice age (360 million years ago)

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The Karoo Ice age (360 million years ago)

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The Appearance of Reptiles (320-310 million years ago)

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The Appearance of Reptiles (320-310 million years ago)

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Reptiles are cold-blooded creatures. Vertebrate animals have backbones. They frequently produce eggs with fragile shells and have dry skin covered in bony plates or scales. It is estimated that the first known reptile lived 315 million years ago. It was between 20 and 30 centimeters (8 and 12 inches) long, and to stay alive, it consumed small invertebrates like insects. It was a marsh creature.

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The Permian Period (299 million years ago)

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The Permian Period (299 million years ago)

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The Triassic Epoch began 251.9 million years ago and lasted until the end of the Carboniferous Epoch 298.9 million years ago. The Permian geologic period and stratigraphic system cover a time interval of 47 million years. The Paleozoic Era comes to an end during the following Triassic Period, which is a component of the Mesozoic Era.

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Although the Mesozoic is best known as the time of the dinosaurs, the bulk of present plant and animal species have their origins during this time.

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The Triassic Period (252 million years ago)

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The Triassic Period (252 million years ago)

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This time period is known as the "Age of Reptiles" for a good reason: at the time, reptiles, notably dinosaurs, dominated land-dwelling vertebrates.

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The Appearance of Dinosaurs (approximately 250-200 million years ago)

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The Appearance of Dinosaurs (approximately 250-200 million years ago)

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They first appeared between 243 and 233.23 million years ago, during the Triassic epoch (mya). Reptiles called dinosaurs once roamed the planet for about 228 million years. Modern birds are classified as a type of dinosaur since they had a common ancestor with dinosaurs other than birds.

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The Jurassic Period (201 million years ago)

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The Jurassic Period (201 million years ago)

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The Jurassic period (199.6 million to 145.5 million years ago) was warm and humid, resulting in lush vegetation and a plethora of life. New dinosaurs proliferated rapidly and in great numbers. There were several different dinosaurs among them, including stegosaurs, brachiosaurs, and allosaurs.

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The Appearance of Mammals (178 million years ago)

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The Appearance of Mammals (178 million years ago)

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The earliest known mammals are the small, shrew-sized morganucodontids, who lived alongside dinosaurs 210 million years ago. Mammals originated during the Triassic Period, around 252 million to 201 million years ago, from members of the reptile order Therapsida. Members of the Synapsida subclass, widely known as the mammal-like reptiles, therapsids were typically lackluster in comparison to other reptiles of their day.

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The Appearance of Birds (150 million years ago)

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The Appearance of Birds (150 million years ago)

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A bird's plumage determines the bulk of its physical traits, including camouflage, attractiveness, and social standing. Archaeopteryx is without a doubt the oldest bird. Like its dinosaur ancestors, it had limited flying abilities. According to fossil evidence, Archaeopteryx had fangs, a long bone tail, grasping claws on its wings, feathers, and a hip that resembled a bird.

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The Cretaceous Period (145 million years ago)

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The Cretaceous Period (145 million years ago)

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Although it is not the largest mass extinction, the most well-known one marks the end of the Cretaceous Period. You may already be aware that the dinosaurs died out during this terrible extinction.

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The Appearance of Flowering Plants (130 million years ago)

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The Appearance of Flowering Plants (130 million years ago)

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According to fossil evidence, flowering plants first appeared in the Lower Cretaceous, around 125 million years ago, and were already rapidly diversifying by the Middle Cretaceous, roughly 100 million years ago. Early angiosperm fossils are uncommon. In the Cretaceous period, 130 million years ago, they began modifying the appearance of the planet almost as soon as they landed.

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The Cretaceous Mass Extinction (66 million years ago)

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The Cretaceous Mass Extinction (66 million years ago)

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After the extinction of the dinosaurs, mammals first appeared during the Cenozoic Era. Because mass extinctions create favorable conditions for the emergence of new species, mammals came in to fill the hole left by the extinction of the dinosaurs. They evolved into a variety of species, including the ones we see today like humans!

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The Tertiary Period (65 million years ago)

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The Tertiary Period (65 million years ago)

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When a meteorite struck the globe, it abruptly ended the reptile-dominated Cretaceous Period and Mesozoic Era by creating a mass extinction that eliminated about 75% of all species on Earth.

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The Neogene period (23 million years ago)

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The Neogene period (23 million years ago)

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The most significant change that occurred during the Neogene period was the emergence of apes and hominids. During the Miocene era, hominids initially appeared in Africa and Eurasia. The majority of hominids began moving to Africa during the Pliocene. These conditions led to the evolution of the earliest humans.

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The Mass Extinction (65 million years ago)

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The Mass Extinction (65 million years ago)

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Mass extinctions have been caused by extreme temperature shifts, shifting sea levels, and catastrophic, once-in-a-lifetime events like an asteroid striking Earth or a sizable volcano erupting in the past. They are known to us because the fossil record demonstrates the evolution of life. Although the most well-known cause of a mass extinction is the asteroid strike that wiped out the non-avian dinosaurs, volcanic activity really appears to have caused much more devastation.

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The Quaternary Ice (2.5 million years ago)

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The Quaternary Ice (2.5 million years ago)

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This causes because the rise of mountain.

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The Appearance of Humans (6 million years ago)

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The Appearance of Humans (6 million years ago)

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The oldest known human ancestors initially appeared between five and seven million years ago, when certain apelike species in Africa possibly began to habitually walk on two legs. They had had begun flinting crude stone tools by 2.5 million years ago. Some of them started to migrate from Africa to Asia and Europe after two million years. In addition, the bulk of ancient humans had jaws that were significantly stronger than ours, perhaps as a result of their sturdier diets.