Why does light carry energy even though it has no mass? This video explains the real physics behind photons, energy–momentum ...

When two black holes merge or two neutron stars collide, gravitational waves can be generated. They spread at the speed of ...

Fortnite Kids DON'T Understand Solar Eclipse. Hey there! I'm Hew Moran, a content creator who combines my passion for gaming, ...

Electrons determine everything: how chemical reactions unfold, how materials conduct electricity, how biological molecules ...

Brett Ambler starred in a 1989 video about kazoos for kids. The video got a new life on YouTube and went viral soon after.

Beware: Novelty sunglasses without UV protection can put kids' developing eyes at greater risk of sun damage. Children wearing sunglasses is a good thing—if they are the right kind. According to ...

By studying faint distortions in galaxy shapes across a vast region of sky, scientists probed the hidden structure of the universe. In the standard picture of the universe, nearly everything is hidden ...

Three kids in Lancaster, Pennsylvania, had the best reaction when their dad revealed an epic holiday lights display. TODAY’s ...

This year, Church areas in Kenya, the Philippines, Brazil and South America have created their own versions of the video to ...