HeLa cells. Bioethics. As of today, 50 million metric tons of Henrietta's "immortal" cells have been grown (enough to outweigh 100 Empire State Buildings). In 1952 alone, Henrietta's HeLa cells helped save millions of people (mostly children) during the worst years of the polio epidemic. Read more: http://www.cracked.com/article_18519_6-people-youve-never-heard-who-probably-saved-your-life_p2.html#ixzz2tYb0m98J
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