The Geologic Record

Content Statement: Evidence of the dynamic changes of Earth's surface through time is found in the geologic record.

Geologic Time Scale

Geologic Time Scale Interactive (Field Museum)

Geologic Time (Berkeley)

Inferring the age of rocks...

Carbon-14 Video Clip: Radioactive Decay of Carbon-14

Source: NOVA: "Hunting the Elements" This media asset was excerpted from NOVA: "Hunting the Elements."

Half-Life