DMT might be the vehicle behind dreams, spiritual awakenings, and even wild visions during near-death experiences.

Fossils found in a cave in northern Spain might be an example of humans – in this case, Neanderthals – collecting things for fun.

In a new study, US researchers shed light on what they call an "explosion" of animal color signals over the past 100 million years – with novel insights about the timing and possible triggers of this evolutionary innovation.

Evidence is growing that Mars was once sloshy and wet, draped with lakes and oceans, which lapped at shorelines and deposited sediments that are, even as you read these words, being scrutinized by robots rolling across the now dry and...