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Paleozoic era
*Cambrian explosion* -most invertrebraes
1st vertebraes
1st land plants
1st trees
1st amphibians, reptiles, then therapids(mammal ancestors)
conifers, swamps, forests
Mesozoic era
Triassic - first dinos
Jurassic- age of dinos
egg laying mammals
1st birds (dino birds)
1st FLOWERS& pollinating insects
K-T MASS EXTINCTION. 2/3 of life
Cenozoic
in order...
-1st primates
-Grass
-Hominids(human ancestors)
*Great Ice Age
Homo sapien(120k)
Homo sapien sapien (40k)
Agriculture rev. (12k)
Modern civ. (5k)
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