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Big Bang
Many scientists have collected a lot of information and theory about The Big Bang. They say just under 14 billion years ago matter in the Universe was concentrated into one little boiling point. This little point began to disperse and enlarge by an explosion. This explosion still remains expansion today. "BBC - GCSE Bitesize: The Big Bang Theory". Bbc.co.uk. N.p., 2016. Web. 12 Nov. 2016. -
First stars are born
The first star was sparked into existence after life was formed. Lars Hernquist, an astrophysicist, said that dark matter provided the first form of gravitational energy for hydrogen and helium gas, to clump up together. Gasses began releasing energy, forming molecules and atoms. As time went on, gravity couldn't make gas clouds. This then resulted the beginning of a protostar (an embryonic star). Astronomy, Science. "How The First Stars Were Born". Space.com. N.p., 2016. Web. 9 Nov. 2016. -
First galaxies form
Somewhat soon after the Big Bang, more matter and stars were formed, forming first galaxies. These galaxies were then formed with other galaxies to combine and enlarge making much bigger galaxies. "A Resource For Research On The Most Distant Galaxies". Firstgalaxies.org. N.p., 2016. Web. 9 Nov. 2016. -
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The Milky Way Galaxy forms
Around billions of years after the big bang, Milky way formed. This was when loose gas was spread out. Gas was then fused together into large clumps that heated up. This heat eventually started the nuclear fusion that powered stars. Larger groups of stars formed, also known as globular clusters. Wethington, Nicholos and Nicholos Wethington. "How Did The Milky Way Form? - Universe Today". Universe Today. N.p., 2016. Web. 20 Nov. 2016. -
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The Solar System forms – The Sun, planets, asteroids, moons
Professionals say that the Solar System was created by gas clouds and dust. An explosion made waves, squeezing the cloud of gas and dust. Gravity then pulled the gas and dust together, which formed the solar nebula. The cloud was surrounded with a disk of gas and dust. This disk got thinner and clumps started to form, being the planets. "Solar System Formation: Gas & Dust To Solar Nebula To Sun With Planets - Windows To The Universe". Windows2universe.org. N.p., 2016. Web. 20 Nov. 2016. -
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First single celled organisms
For the first couple of billions years, Earth consisted of bacteria and archaea, two very common single celled organisms. "The Habitable Planet Unit 1 - Many Planets, One Earth // Online Textbook". Learner.org. N.p., 2016. Web. 13 Nov. 2016. -
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First multi-celled organisms
A hypothesis from a scientist was that a group of certain cells formed into a slug like mass which ended up moving as a multi cellular portion. It is also said that Multi cellular life has evolved more than 45 times but more complex life heave evolved in six groups: animals,land plants, fungi, brown algae, red algae, and green algae. "Multicellular Organism". En.wikipedia.org. N.p., 2016. Web. 20 Nov. 2016. -
First animals with shells and hard parts
During the Cambrian period, big numbers of hard shelled animals appeared. One university student studied pieces of early shells and found out that the pieces were from a strange Cambrian creature called Cambrothyra. The fossils of this creature looked like small crushed up jars and was found near central China. "Geologist Analyzes Earliest Shell-Covered Fossil Animals". The UCSB Current. N.p., 2016. Web. 16 Nov. 2016. -
First vertebrates
Some of the earliest vertebrates appeared to be fish without jaws. They lived around 600 million years ago. They had a weird structure having a skull without a spine. Other classes such as amphibians, reptiles, mammals and birds evolved after fish fish did. The first mammals and birds were discovered about 200 million years ago. Reptiles and amphibians evolved around 350 million years ago. "A Resource For Research On The Most Distant Galaxies". Firstgalaxies.org. N.p., 2016. Web. 9 Nov. 2016. -
Life still confined to the sea, seaweed is the only plant
About 600 million years ago, seaweed, being one of the earliest plants to live with more than one cell, lived in the ocean. Seaweed evolved to live in shallow ocean water, since there wasn't enough sun for the process of photosynthesis. "What Is Seaweed? - Plant History - Quatr.Us". Quatr.us. N.p., 2016. Web. 9 Nov. 2016. -
First signs of land plants and animals
Plants and animals are known as multicellular eukaryotes. Evidence of DNA shows that the first eukaryotes evolved from prokaryotes between 2500 - 1000 million years ago. As well as plants, animals evolved in the sea. That remained for the last 600 million years. The oldest fossil evidence of multicellular animals appeared to be wormlike organisms. They were discovered in China, Canada and India "The History Of Animal Evolution". Sci.waikato.ac.nz. N.p., 2016. Web. 9 Nov. 2016. -
First insects and spiders
About 400 million years ago insects evolved from a group of crustaceans. These animals were the first ever to develop flight. The first insect was named Rhyniognatha hirsti, being aroun 400 million years old. Spiders have evolved at the same time around 400 million years ago, today there are around 40,000 species of spiders. "Evolution Of Spiders". En.wikipedia.org. N.p., 2016. Web. 12 Nov. 2016. "Evolution Of Insects". En.wikipedia.org. N.p., 2016. Web. 12 Nov. 2016. -
Amphibians dominant
During the Carboniferous and Permian periods, amphibians appeared to be the dominant land animals on earth. These amphibian creatures ranged in sizes, similar to a 15 feet long crocodile size. The first amphibians were the tetra pods, also known as the four legged fish. They were discovered around 400 million years ago. Strauss, Bob and Bob Strauss. "300 Million Years Ago, Giant Amphibians Ruled The Earth". About.com Education. N.p., 2016. Web. 12 Nov. 2016. -
Mammal-like reptiles appear
Mammal like reptiles are also called Synapsids. Archaeothyris and Clepsydrops are named the oldest Synapsids discovered in the Carboniferous period. Mammals have passed stages throughout the appearances of their synapsid ancestors. They say that there were a lot of synapsids that looked like mammals. "Evolution Of Mammals". En.wikipedia.org. N.p., 2016. Web. 12 Nov. 2016. "Synapsid". En.wikipedia.org. N.p., 2016. Web. 12 Nov. 2016. -
Dinosaurs abundant, first birds appear
Archaeopteryx was the first primitive dinosaur like bird which appeared about 150 million years ago. These were the largest vertebrates ever known to fly. People discovered that after the Archaeopteryx, birds and dinosaurs shared a lot of skeletal features such as hollow bones. "Origin Of Birds". En.wikipedia.org. N.p., 2016. Web. 12 Nov. 2016. -
Dinosaurs extinct, increase in diversity of mammals of all kinds
At the end of the Cretaceous period, the dinosaurs wiped out while mammals and early birds survived. This was because the mammals and birds had the right characteristics to survive in their new environment. Mammals have the characteristics to adapt their body temperature unlike the cold blooded dinosaurs where they would just die out eventually. Bauer, Adriana. "Why Did The Dinosaurs Die Out? - The Rise Of Mammals". Qm.qld.gov.au. N.p., 2016. Web. 13 Nov. 2016.
