How do wild kangaroos react to remote-controlled cars or instrumental music - and what does it mean?

It sounds like something out of a horror movie, but regenerating body parts is a real specialty of echinoderms.

Humans are not the only ones who enjoy optical illusions. Great bowerbirds make forced perspective illusions, too.

Conservation relies on data—lots of data. So how do you protect a species that’s difficult to count, living in an environment that’s difficult to access?

There’s one animal with seemingly physics-defying faeces: the wombat.

A few species can escape the ageing process completely.

If you’ve ever owned a cat—or been in contact with undercooked meat, or unwashed vegetables—you may be carrying a parasite called Toxoplasma gondii.

It’s that old riddle that’s sparked many arguments through the ages: was it the chicken or the egg that came first?