An archaeologist arranges a deep-sea core from off the coast of Britain. These...
Caution! Do Not Bleach
Students learn why coral reefs are important, and what possible explanations are...
Mon, 11/30/2009 - 12:46
Head to Foot
The lesson begins with a broader introduction on new species discovered around...
Tue, 11/24/2009 - 11:48
Signs of a Recovering Harbor
For more than two centuries, Boston Harbor has been a dumping ground. In 1773,...