Australia’s spiky, shuffling, egg-laying echidna evolved in ‘extremely rare’ event, scientists say

Researchers have compared the monotreme's traits with the Kryoryctes cadburyi, an ancient water-dwelling creature that lived in Australia more than 100m years ago

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Australia's burrowing echidna evolved from a water-dwelling ancestor in an extremely rare" biological event, scientists said in a new study of the peculiar egg-laying mammals.

With powerful digging claws, protective spikes and highly sensitive beaks, echidnas are well suited to a life shuffling through the forest undergrowth. But a team of Australian and international scientists believe many of the echidna's unusual traits were first developed millions of years ago when its ancestors splashed through the water.

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