338 Results

The Stories That Galaxies Tell

Peculiar shapes were the key to realizing that galaxies merge.

How the Cold War Created Astrobiology

Life, death, and Sputnik.

The Quantum Mechanics of Fate

How time travel might explain some of science’s biggest puzzles.

The Mystery of Time’s Arrow

Past and future may not be what they seem.

Initial Conditions

Sean Carroll and Alan Guth talk about time.

The Metaphysical Baggage of Physics

Lee Smolin argues that time is more fundamental than physical laws.

Inconstants of Nature

If the constitution of nature itself were changing in time, how would you know?