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.
01:17 — Airs Tuesdays at 9pm/8c on HISTORY. Don't try this at home! In this episode, our experts cook up ten ways you could destroy the earth, including: swal (more…)
01:41 — Airs Tuesdays at 9pm/8c on HISTORY. They sort of sound like the same phenomenon, but Pulsars and Quasars are very different. Pulsars are tiny--only a (more…)
01:32 — Eveyone knows that the Moon controls our tides, but did you know that if the moon disappeared, Earth would spin much faster, giving us a shorter day; (more…)
01:18 — Airs Tuesdays at 9pm/8c on HISTORY. They are breathtaking, lethal and a constant source of surprise. The stunning rings of Saturn have mesmerized coun (more…)
01:12 — Airs Tuesdays at 9pm/8c on HISTORY. The Universe is full of explosions that both create and destroy. The Chicxulub impact on the Yucatan peninsula, wh (more…)
01:12 — Airs Tuesdays at 9pm/8c on HISTORY. They are the one-stop-shopping places for learning all about the nature and variety of stars in the Universe. They (more…)
01:14 — Airs Tuesdays at 9pm/8c on HISTORY. On alien planets, they rain from the sky as scalding iron. On distant moons, even at hundreds of degrees below zer (more…)
01:53 — Airs Tuesdays at 9pm/8c on HISTORY. Ours is a universe of energy, from powerful jets ejected from black holes to the raw nuclear fury of our Sun. But, (more…)
01:59 — Every year, dozens of objects, both natural and manmade, plummet through out atmosphere and crash into the Earth. These messengers from the sky provid (more…)
01:56 — Airs Tuesdays at 9pm/8c on HISTORY. Outer space is already an essential part of America's ability to fight wars. Our military depends on satellites fo (more…)
- Premiered: May 29, 2007
- Rating: TV-PG
- Premise: An astronomy series examing the history, scientific phenomena and mysteries of the universe. (more)
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