Ancient rocks once beneath the ocean hold clues of severe conditions unimaginable on today's planet. Artwork showing the Earth during the Cryogenian period. This geologic period lasted from 850 to 635 ...
This video examines a moment in Earth’s history when environmental change occurred far faster than expected. Geological and fossil records are compared to show how temperature, carbon levels, and life ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results