Nature

Crash: A Tale Of Two Species

Season 25, Episode 7 of 13

This is a story of the interconnection of life, how every species is important, no matter how big or small. At the center is the humble horseshoe crab, a creature that has remained virtually unchanged for 300 million years. Its annual spring spawning produces millions of eggs that are the lifeline for a tiny bird called a red knot, which migrates 10,000 miles from South America to the Arctic each year. Scientific and medical communities have discovered that the crab also provides an indispensable testing agent for drugs and vaccines, as well as resources for human optics and burn treatment. But horseshoe crab numbers are plummeting from their new use as bait for the fishing industry, dropping by two-thirds since 1990. The precious pyramid depending on this age-old creature is about to come crashing down.

Previously Aired

Day
Time
Channel
4/26/2009
7 p.m.
4/27/2009
2 a.m.
4/29/2009
2 a.m.
5/3/2009
noon
5/16/2010
7 p.m.
5/17/2010
1 a.m.
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