For most animals, reproduction is straightforward: Some species lay eggs, while others give birth to live babies. But our recent research uncovered a fascinating mix between the two modes of ...

Our earliest vertebrate (animals with backbones) ancestors laid eggs, but over millions of years of evolution, some species began to give birth to live young. There is a traditional dichotomy in ...

Normally, animals reproduce by either laying eggs or giving birth to live young, but an Australian species of lizard can apparently do both in the same pregnancy. Scientists at the University of ...

A lizard that both lays eggs and gives birth to live young is helping scientists understand how and why these forms of reproduction evolved. The old riddle, “Which came first, the chicken or the egg?” ...

Evolution has been caught in the act, according to scientists who are decoding how a species of Australian lizard is abandoning egg-laying in favor of live birth. Along the warm coastal lowlands of ...

Chameleons exhibit diverse reproductive strategies, with most species laying eggs in warm soil while a few, like the Jackson's chameleon, give birth to live young. This adaptation to environments, ...

Charles Foster receives funding from The University of Sydney. Camilla Whittington receives funding from The University of Sydney and the Australian Research Council. Our earliest vertebrate (animals ...