Sensory overload is often about uncertainty and how long the brain has to stay engaged—especially in autism and ADHD.

When a baby smiles at you, it's almost impossible not to smile back. This spontaneous reaction to a facial expression is part ...

Humans and some other animals use their two eyes in coordination to support binocular depth perception. The left and right eyes obtain images of the visual scene from slightly different viewpoints, ...

In 490 BC, the Persian Army landed on the plain of Marathon, 25 miles from Athens. The Athenians sent a messenger named Feidipides to Sparta to ask for help. He ran the 150 miles in two days. The ...