History of the Earth

First Homo sapiens

150

Homo sapiens, also known as humans first appeared about 1.5 million years ago. Humans are popularly believed to have evolved from apes, which is an important factor to the evolution of our species.

Cretaceous-Paleogene extinction

166

The K-T Extinction event happened over a short period of time, about 65 MILLION years ago. This is the extinction that killed the dinosaurs :((( and no theories have been scientifically proven as to how this extinction occured.

Pangea breaks apart

200

Pangea broke apart about 200 million years ago. Now, we have the seven continents of North America, South America, Europe, Asia, Africa, Antarctica, and Australia

Triassic-Jurassic extinction

206

The Triassic-Jurassic extinction occured about 206 MILLION years ago.

Permian-Triassic extinction

250

This extinction occured 250 MILLION years ago. This was an extinction of many types of reptiles.

Pangea formed

270

Pangea was formed about 270 million years ago. Pangea was the singular mass of land that later broke into the seven continents we know to day of north america, south america, europe, asia, africa, antarctica, and australia.

Late Devonian Exctinction

375

The Late Devonian extinction occured about 375 MILLION years ago. This wiped out most plant and aquatic life on earth at that time, wiping out 70 percent of all species.

Ordovician-Silurian extinction

445

This extinction occured approximately 445 MILLION years ago. Two events occurred that killed off 27% of all families, 57% of all genera and 60% to 70% of all species. Together they are ranked as the second largest of the five major extinctions in Earth's history.

1st multicellular life

Jan 1, 600

The first multicellular life appeared about 600 million years ago. Before this event, the only organisms on earth were prokaryotic and eukaryotic single-celled organisms. The formation of this was the start of new and conscious organisms developing.

1st eukaryotes

Jan 1, 1500

First eukaryotic life appeared about 1.5 billion years ago. This is a new form of life other than the prokaryotes. This is the second form of life that occured on earth.

Oxygen enters earths atmosphere

Jan 1, 3500

Oxygen entered earth's atmosphere 3.5 billion years ago. This was an important event in history because it allowed the development of many new organisms to be developed in the future.

First forms of life

Jan 1, 3800

First forms of life appeared about 3.8 billion years ago, The First forms of life on earth were single celled, prokaryotic cells such as bacteria.

Earth is formed

Jan 1, 4500

The earth was formed 4.5 billion years ago. There are many theories to how the earth was formed, including the Big Bang Theory, or other religious beliefs. We cannot know for sure exactly how the earth was formed.