A broken hill, an ancient crater and the human tendency to find faces everywhere may explain the teddy bear on Mars.

A mysterious "whirlpool" of light temporarily shone in the night sky above Hawaii's Mauna Kea. Experts think it was linked to a SpaceX launch.

A mouse study hints at why chronic pain and poor sleep are linked.

Elephants are known for their extraordinary memories, but is it true that they never forget?

Fish and chip shops across Australia are using threatened shark meat in their food.

During the Eocene, the Arctic was a warm, swampy place that these primates called home.

From programs to build supersonic flying saucers to atomic bombs, here are the most fascinating declassified military and CIA secrets.

In regressive evolution, organisms lose complex features and can appear to evolve "in reverse." But evolution doesn't retrace its steps, experts said.

It's easy to fold a piece of paper in half once, twice or even three or four times. But what's the highest number of times one piece of paper can be folded in half?

Love stimulates the release of hormones such as oxytocin in certain brain regions.

Is the simplest explanation always the best one, as Occam's razor states?