Poison dart frogs leap to the top for frog fitness

The most toxic, worst-tasting poisonous frogs are also the most physically fit, a new study finds.

Poison dart frogs, which are native to the rain forests of the Amazon, secrete a bitter toxin from their brilliantly patterned skin. Researchers put nearly 500 of these frogs to the test on a hamster-wheel-like contraption to find out how athletic each species is. The findings from this amphibian Olympics, published March 28 in the journal Proceedings of the National Academy of Science, revealed that the deadliest frogs are also the most vigorous.

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