02:00 — From wormholes to transporters, examine which elements from popular sci-fi movies could really exist.
01:37 — Explore the threats to Earth from supernovas, gamma-ray bursts, and stars that collide.
03:08 — Would a collision with a comet end all terrestrial life on the Earth as we know it today?
01:01 — Which is more abundant in the universe, matter or energy?
02:48 — About 400 billion years ago, a catastrophic planetary impact created the moon and stabilized earth's orbit.
03:04 — Scientists are using particle accelerators to re-create the conditions of the early universe.
01:00 — Does the expansion of the universe apply to our bodies, Earth and the solar system? Astrophysicist Alex Filippenko explains.
02:56 — Over billions of years, Earth has developed essential properties that allowed living organisms to form.
01:00 — Are there extra dimensions? If so, could there be space trapped inside?
02:55 — In December 2009, NASA launched an infrared satellite to discover asteroids on a collision course with earth.
03:09 — Scientists are attempting to create a perpetual source of energy using nuclear fusion.
Cast & Details See all »
- Premiered: May 29, 2007
- Rating: TV-PG
- Premise: An astronomy series examing the history, scientific phenomena and mysteries of the universe. (more)