video

Coral Reefs Changing Over Time

How do we know what coral reefs looked like hundreds of years ago? Often times, we...

Lesson Plan

The Puzzle of Ice Age Americans

Students describe alternative theories for arrival of first humans to come to...

Article

Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

In the seagrass beds and kelp forests of the Oligocene-Miocene transition, nearly...