Modern human	10,000 ya
Yellowstone eruption	600,000 ya
Yellowstone eruption	1,200,000 ya
Collision of India with Asia	40,000,000 ya
Dinosaurs became extinct, flood basalt event	65,000,000 ya
Opening of Atlantic Ocean, flood basalt event	200,000,000 ya
End flood basalts Siberia Beginning flood basalts Siberia	251,941,000 ya 252,280,000 ya
Beginning of Permian period (end Carboniferous/Pennsylvanian)	286,000,000 ya
First insects	400,000,000 ya
Beginning of Cambrian period - rise of multicellular organisms	544,000,000 ya
First known animals	1,200,000,000 ya
Buildup of free oxygen in atmosphere	2,700,000,000 ya
Origin of earth	4,600,000,000 ya