When we think of mammals, we usually think of animals that give birth to live babies, like lions or humans. But there’s a ...

Monotremes, which are egg-laying mammals, are the oldest living mammalian lineage, and this finding by University of Adelaide sheds new light on their evolutionary trajectory. Though monotreme ...

One group that evolved in the southern continent was the monotremes. Monotremes are different from other kinds of mammals because they lay eggs. At least four different kinds of monotremes that ...

Discover more about these spiky, gentle beings. 1. Echidnas are monotremes - mammals that lay eggs. They are one of two mammals in the world to do so. It takes about 22 days after mating for the ...

So, if monotremes aren't part bird ... an unusual feature not found in other mammals. Where did these venoms come from? As it turns out, they arose through the duplication of genes that have ...

These small early mammals developed hair, homeothermy, and lactation (red lines). Monotremes diverged from the therian mammal lineage 166 Myr ago and developed a unique suite of characters (dark ...

Australia has the most diverse collections of living mammals in the world. No other continent has the egg-laying monotremes and the pouched marsupials living side by side with placental mammals.

Six monotremes living in the same place at the same time, 100 million years ago at Lightning Ridge, NSW. Clockwise from lower left: Opalios splendens, a newly described species dubbed an ...

The chance discovery of a long-forgotten tray of fossils in the collections of the Australian Museum has highlighted a previously unknown “Age of Monotremes” that thrived while dinosaurs ruled the ...