It kills bacteria by ripping it apart and destroys HIV like a trained assassin. No, it's not some new miracle drug or surgical treatment. It's crocodile blood. Scientists in Australia's tropical north are collecting the blood after discovering that the immune system of crocodiles there is much more powerful than that of humans, preventing life-threatening infections after savage territorial fights. "They tear limbs off each other, and despite the fact that they live in this environment with all these microbes, they heal up very rapidly," said U.S. scientist Mark Merchant. Merchant and others are hoping to develop powerful new drugs for humans, possibly one to fight HIV. "If you take a test tube of HIV and add crocodile serum, it will have a greater effect than human serum," said Australian researcher Adam Britton.
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