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

One of the oldest unsolved riddles in planetary science concerns the origin of the moon. Over a century ago, George Darwin ...

Normal matter – which makes up everything we see and touch – isn’t the only type of matter present in the universe.

How a Finnish physicist named Karl Lemström once became obsessed with recreating the aurora borealis from scratch – and may ...

Observations of the formation of light-nuclei from high-energy collisions may help in the hunt for dark matter.

Three thought experiments involving “demons” have haunted physics for centuries. What should we make of them today?