Animals with larger brains produce fewer, larger offspring, explaining why birds evolved bigger eggs than the largest dinosaurs.

Evolution, a new five-part series tells the extraordinary story of how life on Earth has changed over more than four billion ...

Standing up to 3 metres tall and weighing hundreds of kilograms, Madagascar’s elephant bird was among the largest birds to ...

A Riddle Older Than Chickens Themselves If you thought this was just about breakfast, think again: according to current paleontological evidence, the first animals capable of laying eggs appeared ...

If something exists in nature, there is most likely a very good reason for it. While there are exceptions, many features "selected" by evolution serve a purpose. Take the blue manakin, a small bird ...

A 150-million-year-old bird fossil, Zhengheornis, reveals the first step in the evolution of the short tails seen in modern ...

To keep eggs alive, many birds do something far stranger than simply sitting on them. Their bodies physically transform in ways that blur the line between parent and incubator.