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12:00AM Earth Forms
Gas and dust in space, known as planetary nebula, condense into one mass, now known as our planet Earth. This occured 4600 million years ago. -
Period: to
One Calendar Year
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12:30PM First Cells
The origin of life has come upon the Earth. The first cells are dated back to 3900 million years ago. -
3:39PM Oldest Dated Rocks
Our oldest dated rocks can be traced to 3800 million years ago. -
1:33PM Fossils of Stromatolites
3600 million years ago, our first stromatolites lived. These are fossils of blue and green algae that are considered to be prokaryotes. -
9:54PM First Cells with Nuclei
The first fossil evidence of a cell containing a nucleous can be traced back 2100 million years. -
5:11PM The Paleozoic Begins
Throughout the Paleozoic, which began 544 million years ago, numerous basic organisms devlop on our planet. Beginning with our first fish and land plants, 505-407 million years ago. -
8:49AM First Insects
Beetles, scorpians, and centipedes were roaming the planet 385 million years ago. http://3quarksdaily.blogs.com/3quarksdaily/images/leafinsect_vmed_1p.jpg -
3:54AM First Ampibians
Approximately 375 million years ago, our first land animals appeared. Soon after, the first sharks and seeded planets developed. -
5:50PM First Reptiles
The first reptiles appeared on Earth 330 million years ago. -
12:09PM The Mesozoic Begins
A major event occured that killed about 95% of the planet's population. This occured 245 million years ago to begin the Mesozoic time, where reptiles will prosper. -
8:37PM First Dinosaurs
The first dinosaurs were living 228 million years ago, just after the first crocodiles graced the planet. -
9:59AM First Mammals
Just after the beginning of dinosaurs, the first mammals began their survival on Earth. The mammals were small, shrew like organisms. Soon after, the dinosaurs began to prosper and develop to the extent that there were many different types, herbivores, carnivores, and omnivores. -
8:24PM First Flowering Plants
About 115 million years ago, the first flowering plants could be seen on our planet. -
7:52PM The Censozoic Begins
The Mesozoic ends just like the Paleozoic, with a major impact event killing much of the organisms that inhabited the Earth. This time period will be known as the age of mammals. -
9:47PM First Ancestors of Dogs and Cats
About 64 million years ago, the first ancesstors of dogs and cats can be found on earth. -
5:25AM Widespread Grasses
Grasses become widespread 60 million years ago. -
11:09AM First Ancestors of Pigs and Deer
The first ancestors of pigs and deer can be traced back 57 million years. Soon after, the ancestors of horses and rabbits developed on our planet. -
9:31PM First Monkeys
About 39 millions years ago, the first monkeys existed on our earth. -
5:18PM Oldest Human-like Ancestors
About four million years ago, organisms that resembled humans roamed the earth. -
11:02PM Oldest Direct Human Ancestor
The first direct human ancestor was on earth only one million years ago. -
11:48PM First Modern Man
Homo sapiens began to exist on our planet .1 million years ago, which is the same as 100,000 years ago. -
11:59PM Revolutionary War
According to this geologic time scale, the Revolutionary War would have happened only one minute before present time, yet it occured 234 years ago.
