An incredible animation has been released showing how a fertilised egg grows into a baby, over the nine months of pregnancy. Failed Science, a Twitter account tweeting gifs, images and videos 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?” ...

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 ...

An Australian skink which laid eggs and gave birth weeks later provides an opportunity to study the evolution of pregnancy, a Sydney researcher says. A three-toed skink gave birth to eggs followed by ...

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 ...

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 ...