Time of Year
|
Biologic Event
|
| January
|
No sign of life.
|
| February
|
Still no sign of life.
|
| March
|
Still waiting for life!
|
| Early April
|
First Unicellular Organisms
|
| Late April
|
Multicellular Aggregates
|
| May
|
Vertebrates Emerge
|
| July
|
Land Plants start to spread.
|
| Mid-September
|
Early Reptiles
|
| Late September
|
Dinosaurs Emerge
|
| Early November
|
Birds and small Mammals Appear
|
| Late November
|
Mammals Flourishing
|
| December First
|
Dinosaurs disappear abruptly
|
| Late December
|
Mammals we would recognize debut
|
| December 31st, noon
|
Hominids Appear
|
| December 31st, 9:30-10pm
|
Humans Expand out of Africa
|
| December 31st, 11:54pm
|
Beginning of recorded human history, "civilization"
|
