-
4600 BCE
M: Formation of the Earth
-
Period: 4600 BCE to 3800 BCE
Hadean Era
-
4100 BCE
L: Rapid Growth of Continents
-
Period: 3800 BCE to 2500 BCE
Archaean Era
Brown -
3500 BCE
23: Life (bacteria-prokaryotes)
-
2700 BCE
22: Eukaryotes
-
Period: 2500 BCE to 570 BCE
Proterozoic Era
White -
2400 BCE
K: Free Oxygen Building Up in the Atmosphere (about .2%)
-
2100 BCE
21: Multi-cellular Organisms (algae)
-
600 BCE
20: Soft-bodied Animals
-
Period: 570 BCE to 245 BCE
Paleozoic Era
Orange -
540 BCE
19: Animals with hard shells
-
500 BCE
18: Vertebrates (jawless fish)
-
430 BCE
17: Land Plants
-
400 BCE
16: Land Animals (insects)
-
380 BCE
K: Free Oxygen Nears Present Levels (21%)
-
360 BCE
15: Amphibians
-
320 BCE
I: Extensive Coal Deposits (North America and Europe)
-
310 BCE
13: Reptiles
-
290 BCE
H: Formation of Supercontinent Pangea
-
Period: 245 BCE to 208 BCE
Triassic Period
Light Blue -
215 BCE
12: Dinosaurs
-
210 BCE
11: Mammals
-
Period: 208 BCE to 146 BCE
Jurassic Period
Red -
200 BCE
G: Breakup of Pangea and Formation of the Atlantic Ocean
-
155 BCE
10: Birds
-
Period: 146 BCE to 65 BCE
Cretaceous Period
Purple -
130 BCE
9: Flowering Plants
-
70 BCE
F: Formation of Rocky Mountains
-
65 BCE
E: Cretaceous/Tertiary Meteor Impact
-
Period: 65 BCE to 2
Cenozoic Era
-
55 BCE
8: Primates
-
45 BCE
D: Formation of the Himalayan Mountains
-
45 BCE
C: Separation of Antarctica and Australia
-
35 BCE
7: Monkeys
-
6 BCE
6: Hominids
-
3 BCE
5: "Lucy" (Australopithecus)
-
2 BCE
B: Land Bridge Between North and South America
-
2 BCE
4: Manufactured Stone Tools
-
1 BCE
3: Neanderthals
-
1 CE
A: Most Recent Ice Age
-
1 CE
2: Modern Humans
-
1 CE
1: Pictograms- Earliest Written Communication
