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 ...

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 ...

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?” ...

Melanie Laird receives funding from The University of Otago. Camilla Whittington receives funding from the Australian Research Council. University of Sydney and University of Otago provide funding as ...

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 ...

As a rule, reptiles lay eggs, while mammals deliver young through live birth. According to new research, however, this distinction is a bit more fluid than most assume—for reptiles, at least. Ancient ...

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 ...

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 ...