Why it matters: While not evidence of life, these discoveries show that ancient Mars had complex organic chemistry, ...

Some butterfly species can’t grow unless they trick ants into taking them home with a complex rhythmic signal.

These caterpillars rely on ants to tend them, and they use a surprisingly complex sense of rhythm to make it happen ...

Advances in organ and computer models are raising the prospect that some animal experiments could be eliminated. But there are still huge hurdles to overcome.

Ever stared at a trippy image and wondered why your brain picks one thing over another? Optical illusion personality tests ...