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This is the birth of the universe, the moment when all matter in the Universe went from being held in a small, extremely dense lump, to exploding and rapidly expanding into the universe. It is still expanding to this very day. Every other galaxy is moving away from us, the further away a galaxy is, the faster it is moving away. this proves that it is still expanding BBC - GCSE Bitesize: The Big Bang theory
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The first generation of stars lived hard and diesd quickly. Stars formation began when the denser parts of the interstellar gas clouds cores collapsed under their own weight and gravity. The cores are denser than the outer cloud, so they collapsed first. As they collapsed they broke into clumps, these clumps then formed into pro stars and the whole process took about 10 million years. http://abyss.uoregon.edu/~js/ast122/lectures/lec13.html
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the first galaxies formed 200 million years after the universes birth, that is about 300 years earlier than the oldest previously known galaxies. This galaxy was detected through a cluster of galaxies called Abell 383. the alignment of this galaxy, Abell 383 and Earth http://www.space.com/11386-galaxies-formation-big-bang-hubble-telescope.html
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The Milky Way Galaxy is approximately 13.6 billion years old. After the Big Bang happened, and the universe cooled down, there was a gas that spread everywhere. The gas formed into clumps, they heated up and eventually started the nuclear fusion that powers stars. the stars started to attract to each other into larger groups. One of the oldest groups are called Globular Clusters. These are the clusters that form the Milky Way. http://www.universetoday.com/26749/formation-of-the-milky-way/
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scientists believe that our solar system was formed when an explosion of a star happened and the waves from the explosion made a gas and dust cloud collapse, as gravity pulled them together to fom a Solar Nubela. The cloud spun as it collapsed. Eventually the it formed to a disk and the disk got thinner parts began to stick together and form clums, these clumpas are all of out planets and moons. http://www.windows2universe.org/our_solar_system/formation.html
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For the first billion years, life on Earth consisted of only bacteria and archaea, microscopic organisms that represent two of the three genealogical branches on the Tree of Life. Both groups are prokaryotic (single-celled organisms without nuclei) came in roughly a billion years after Earth formed. The first known single-celled organisms appeared on Earth about 3.5 billion years ago. https://www.learner.org/courses/envsci/unit/text.php?unit=1&secNum=7
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The first single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago. The evolution. The evolution of multicellular life from simpler, unicellular microbes was a massive change on Earth, it helped reshaped the planet’s ecology. http://www.astrobio.net/origin-and-evolution-of-life/multicellular-life-evolve/
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About 520 million years ago the first animals with shells were living in the ocean. These ocean dwelling creatures measured to a few centimeters lengthwise. One student in the Department of Earth And Science analyzed fossils of the earliest animals, and said since then there has been major diversifications of animal life in the oceans. Many of the major animal groups are still alive today. http://www.news.ucsb.edu/2009/012711/geologist-analyzes-earliest-shell-covered-fossil-animals
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At this point the animal life was still confined to the water, there were no land animals and seaweed was still the only plant, plants had not yet reached the land either.
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The first signs of land plants had evolved on Earth by about 700 million years ago and land fungi by about 1,300 years ago. The early apperance of these plants and fungi suggests that there was a temperature drop on earths surface roughly 750-580 million years ago during the series of Snowball Earth Events, then there was a sudden apperance of many new species of fossil animals. http://science.psu.edu/news-and-events/2001-news/Hedges8-2001.htm
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The insects originated on Earth roughly 480 million years ago. They evolved from a group of crustaceans. Around 80 million years later some of the insects adapted wings, they were the first animals to do so. The oldest insect fossil The Rhynoignatha Hirsti, is estimated to be 407 to 396 million years old. https://en.wikipedia.org/wiki/Evolution_of_insects
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300 million years ago Amphibians were the most dominant animals on Earth. Some of them would reach up to 15 feet long which was very big back then. because of their size they would terrorise the smaller animals. they were the predators of this time. http://dinosaurs.about.com/od/otherprehistoriclife/a/prehistoric-amphibians.htm
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The "mammal-like" reptiles were a very big group of reptiles that have a lot of characteristics also found in mammals. Mammals rose from one or more groups of creatures within this " mammal-like" reptile species. These vertebrae all vary, by their weight, their habitat and some can even fly wilst others can not. but they have many characteristics in common. http://www.icr.org/article/mammal-like-reptiles/
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Approximately 230 million years ago, dinosaurs evolved from the reptiles. The Plateosaurus was one of the first large herbivore dinosaurs. This dinosaur walked on 4 legs most of the time and occasionally stood on his two back legs to eat leaves from the tops of the tall trees. http://www.lpi.usra.edu/education/timeline/gallery/slide_54.html
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65 million years ago the last of the dinosaurs went extinct. As well as the giant mosasaurs and plesiosaurs in the seas and the pterosaurs in he skies. A lot of other species vanished. more than half of the worlds species were obliterated around the same time. scientists believe that the reason for the extinction could have been from asteroids or volcanoes, they think the fallout from the impact killed them off. http://science.nationalgeographic.com/science/prehistoric-world/dinosaur-extinction
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Our species of humans (homo sapiens) first began to evolve almost 200,000 years ago, in association with the new technology of the early neanderthals. The homo sapiens came after the Neanderthals, but they did meet. it is likely that both are descendants from the Homo Heidelbergensis. http://anthro.palomar.edu/homo2/mod_homo_4.htm
