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Tropical turtle fossils discovered in Wyoming reveal that when Earth got warmer, prehistoric turtles headed north. But if today's turtles try the same technique to cope with warming habitats, they might run into trouble.

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Lizards and other reptiles are not normally considered venomous, but a number of lizard species actually do produce and use venom. The most classic venomous lizard is no doubt the gila monster -- a heavy-bodied lizard. As the first in the world, a group of researchers has made a comprehensive description of the proteins in the venom which can prove to be relevant in connection with developing new types of drugs.

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A new study has identified two major foraging grounds of the Mediterranean green turtle and recommends the creation of a new Marine Protected Area to preserve the vulnerable species.

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For more than a decade, a vial of rare snake venom refused to give up its secret formula for lethality; its toxins had no effect on the proteins that most venoms target. Finally, an international team of researchers figured out its recipe: a toxin that permanently activates a crucial type of nerve cell protein, preventing the cells from resetting and causing deadly seizures in prey.

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