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His curious discovery, 200 years ago, foresaw our expanding universe.

How three groups are competing to make the first extremely large telescope.

Shining a light on the spark that separates man from beast.

It may well make more sense to improve an already proven technology—fission.

Bringing the universe home.

Every 29 years, their light proves disastrous.

How Paleolithic artists used fire to set the world’s oldest art in motion.

The meaning of light through history in science, religion, philosophy, and culture.

Since the universe formed, photons have affected everything.

In unseen worlds, science invariably crosses paths with fantasy.

Technology has fed our addiction to light, and might help us end it.