GTS

HADEAN EON

VOLCANIC ACTIVITY

WASTELAND

ORGANIC CARBON

SINGLE-CELLED

CRUST OF THE EARTH

ARCHEAN EON

ORIGIN

MICROBES

PRIMORDIAL

FOSSILS

CARBON DIOXIDE

CYANOBACTERIA

PROTEROZOIC EON

ATMOSPHERE

MULTI-CELLULAR

NUCLEUS

DIVERSIFY

PHANEROZOIC EON

DINOSAURS

PALEOZOIC ERA

CAMBRIAN EXPLOSION

EXOSKELETONS

TRILOBITES

PANGEA

REPTILES

MAMMALS

CATACLYSM

AMPHIBIANS

ERAS

EPOCHS

PERIODS