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Published online 9 July 1998 | Nature | doi:10.1038/news980709-3
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The creature from the black lagoon
Toads to tapirs, turtles to turtle-doves, the diversity of land vertebrates, or tetrapods, seems enormous. Human beings are tetrapods, as are most of the animals with which we are familiar: we are descendants of lobe-finned fishes that evolved legs and subsequently came ashore, more than 360 million years ago.
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