|
millions
of years |
event |
|
4500 |
origin
of earth |
|
3500 |
oldest fossil bacteria
|
|
3000+ |
appearance
of photosynthesis |
|
2000+ |
oxygen
containing atmosphere |
|
1500 |
appearance
of eucaryotes |
|
800+ |
appearance
of metazoans |
|
600+ |
appearance
of chordates |
|
600 |
appearance
of organisms with hard parts |
|
600 |
end of Precambrian eon
|
|
600 |
85%
of earth's history already over |
|
600 |
start
of phanerozoic eon |
|
600 |
beginning of Cambrian period
|
|
550 |
appearance
of jawless fish
|
|
500 |
end
of Cambrian period |
|
450 |
appearance
of terrestrial plants |
|
420 |
appearance
of jawed fish
|
|
350 |
appearance of amphibians on land
|
|
300+ |
appearance of reptiles
|
|
300 |
appearance
of insects |
|
250 |
appearance
of mammal-like reptiles |
|
200+ |
appearance
of mammals |
|
200+ |
appearance
of dinosaurs
|
|
200 |
start
of Jurassic period
|
|
150 |
end
of Jurassic period |
|
150 |
appearance
of birds |
|
80 |
appearance
of tree shrew-like protoprimates |
|
65 |
meteor
strikes earth leading to extinction of dinosaurs |
|
65 |
end
of the Cretaceous period |
|
65 |
beginning
of the Tertiary period |
|
65 |
beginning
of the "age of mammals" |
