An extraordinary feat pulled off by a lizard could suggest the species is going through a rare evolutionary transition

For most of the animal kingdom, babies are born in one of two ways: their parent either lays eggs or gives birth to live offspring. Recently, a three-toed skink (Saiphos equalis) pulled off an extraordinary feat: It laid three eggs and delivered another baby through live birth in the same pregnancy. That suggests that the lizard species is in a rare transitional form between egg-laying and live-bearing animals, according to a study published in Molecular Ecology last month.

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