Lizard Evolving for Live Birth
Photograph courtesy Rebecca A. Pyles
Evolution has been caught in the act, according to a study we covered this summer suggesting that a species of Australian lizard is abandoning egg-laying in favor of live birth.
Along the warm coastal lowlands of New South Wales (map), the yellow-bellied three-toed skink lays eggs to reproduce. But individuals of the same species living in the state's higher, colder mountains are almost all giving birth to live young.
