The Chicago Archaeopteryx features more soft tissue and delicate skeletal details than any known fossil of its kind, and ...

Fossilized claw tracks discovered in Australia show that the animal group that includes reptiles, mammals and birds formed ...

Fossil tracks found in Australia push the origin of reptiles back by 40 million years, altering the timeline of tetrapod ...

We now have full genome sequences for six species of apes, helping us to pin down our last common ancestor – and potentially ...

A Chicago fossil of Archaeopteryx uncovers unknown features, supporting theories of bird evolution from dinosaurs and highlighting its unique flight adaptations.

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

New fossil evidence suggests echidnas evolved from a water-dwelling ancestor, not a land-based one. The bone structure ...

New analysis of a 100-million-year-old fossil embedded in a rocky cove in Australia suggests echidnas may have evolved from ...

The team argues that the reptile’s alligator-like appearance was likely a matter of convergent evolution rather than ... makes sense as Deinosuchus fossils show an array of traits seen in ...

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

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

The new research could upend what’s known of the evolution of the most primitive mammals alive today. Found in Australia and New Guinea, the platypus and echidna are called monotremes ...