For decades, scientists have known that platypuses and echidnas – Australia's unique egg-laying mammals – have another developmental quirk: they don't use the same genetic toolkit as other mammals to ...

Researchers from the University of Adelaide, in collaboration with the University of Melbourne, University of Queensland and ...

A newly analyzed fossil has revealed surprising insights into the evolutionary history of echidnas, suggesting that their ancestors may have lived in water before transitioning to a terrestrial ...

The monotreme lineage diverged from other mammals approximately 166 million years ago, retaining primitive reptilian features while developing mammalian characteristics. Today, only five species of ...