A Swimming Snail
Sea butterflies (also called pteropods) are sea snails aptly named: they are...
Build Your Own Ecosystem
Students identify key functions that are present in healthy ocean ecosystems....
Mon, 11/30/2009 - 18:49
Head to Foot
The lesson begins with a broader introduction on new species discovered around...
Tue, 11/24/2009 - 11:48
Swimming With Sharks
Lying in water only a foot deep, I watched the shark meander lazily through the...
Life in the Field
To a photographer, all that matters is the image, the picture that results when the...