Crab's blue blood saves lives

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Horseshoe crabs' bright-blue blood protects us but not all survive their "donations."http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=AUvUQ7Xwvvk:byWH1Wcq8rY:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=AUvUQ7Xwvvk:byWH1Wcq8rY:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=AUvUQ7Xwvvk:byWH1Wcq8rY:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=AUvUQ7Xwvvk:byWH1Wcq8rY:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=AUvUQ7Xwvvk:byWH1Wcq8rY:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=AUvUQ7Xwvvk:byWH1Wcq8rY:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=AUvUQ7Xwvvk:byWH1Wcq8rY:gIN9vFwOqvQ)
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