History of Life
History of Life Terminology
- Palaeo: older, ancient; relating to geological past.
- Anthropos: “human being”
- Archae: primitive
Geological Ages
- Earth is approximately billion years old.
- Realistic age calculated in 1953 by Clair Patterson using the U-Pb method on a meteorite crater in Arizona.
Geological Time Scale
- Phanerozoic: