A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

Between backward-facing-feet, nipple-less milk secretion and egg-laying, platypuses and echidnas are some of the strangest ...

Typically, mammals give birth to live young. However, three unusual species defy this norm. Scientists are intrigued by the ...

The platypus and echidna, often regarded as some of the most peculiar animals on Earth, may be hiding a far more complex ...

Neither animal has teeth, and though they both produce milk, they secrete it through ... probably shared a lot more biology with a monotreme than with a horse, a dog, a cat or ourselves.” ...