Cosmic Perspective

Our series host loves puzzles—they're fun and challenging. And to him, the greatest of these puzzles of all are the laws of the universe.

The study of the smallest particles offers insight into the biggest event that ever was, the birth of the universe.

Do all stars live to the same age? Are some immortal? Learn about aging in the cosmos.

How can light show us the history of the universe?

Find out why we can't live with asteroids and we can't live without 'em.