Did you know that some squirrels, otters and goats are capable of autofellatio?  And ferrets, macaques and dolphins can use rocks, plants and other objects as sex toys? 

Females have twice as many copies of some genes as males do – and exactly how different species manage this imbalance has puzzled scientists for decades.

Bluespotted ribbontail rays create blue in a unique way, researchers report in a new study.

Once upon a time, Earth was barren.

A 2.4-billion-year old microfossil found in the Pilbara's Hamersley Ranges could be a missing link in the evolution from simple to complex life, according to researchers.

Dr. Ruth Westheimer became the go-to person for sex advice.

Evidence of the oldest known platypus and a new species ‘echidnapus’.

Are wombats the accidental heroes of the Australian bush? After the Black Summer bushfires, we set up 56 cameras to capture animal activity in areas with and without wombat burrows to find out.

Tardigrades are possibly the most indestructible animal on Earth.

A frozen chunk of genome rewrites our understanding of the bird family tree.

When you view the world a certain way, it's easy to forget not everyone has the same vision.

Small, shelled, and unassuming, chitons have eyes unlike any other creature in the animal kingdom.

Unusual trees found fossilized in Canada were buried alive 350 million years ago. Scientists say the discovery opens a new window into the history of life on Earth.

In a stark example of how everything on our living planet is interconnected, one species of tiny, invasive insects has reduced lions' abilities to feast on zebras.

Peering into the jungle of microbes that live within us, researchers have stumbled across what seem to be an entire new class of virus-like objects.

In an unprecedented encounter, a research team successfully engaged in a "conversation" with a humpback whale named Twain.

An ecologist, a mathematician and a taxonomist were locked down together in a suburban house. So they counted all the species of plants and animals they could find.