Why more species live in Amazon rainforests: Evolution of treefrogs sheds light on the mystery

For more than two hundred years, the question of why there are more species in the tropics has been a biological enigma. A particularly perplexing aspect is why so many species live together in a small area in the tropics, especially at some sites in the rainforests of the Amazon Basin in South America. New research on the evolution and ecology of treefrogs sheds new light on the puzzle.

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