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The Mountains of Mars (2:27)

Scientists determine the mountains on Mars did not form by plate tectonics.

The Planets: The Sun and Solar Wind (1:54)

The sun generates powerful, electrically-charged storms that lash out across the inner planets.

Space Week: Space Station and Beyond 1 (1:21)

For the privileged few, the view from the International Space Station is ever-changing and always amazing. Learn more about the International Space Station in this video.

Space Week: Space Station and Beyond 2 (2:41)

A mission to Mars will be an expensive, long-term endeavor, but it's a dream that inspires the next generation of spacefarers. Learn more about the mission to Mars in this video.

Humans Already on Mars (0:37)

Have humans already landed on Mars? Watch this Reuters video of new pictures taken by NASA's Spirit Rover that shows an image resembling a human shape on Mars. NASA is planning more investigation.

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The Planets: The Sun and Solar Wind (1:54)

The sun generates powerful, electrically-charged storms that lash out across the inner planets.

The Planets: The Sun and Solar Flares (1:13)

Following the discovery of solar prominences by Skylab, we now know that the most violent solar episodes are the immense Coronal Mass Ejections.

Life - Surveying the Solar System (3:53)

The first extra planetary probes report that our closest neighbors are desolate places.

Mars Rising: Episode 1 (2:14)

The trip to Mars entails many physical and mental challenges, and research teams work around the clock to predict how problems might occur.

Mars Rising: The Beginning (4:06)

The quest for the holy grail of space exploration begins, as scientists set forth the plan to land a manned expedition on Mars.

Different Worlds - Accretion (2:58)

The planets are constantly bombarded by particles of all sizes, some large enough to cause catastrophic hits.

Destiny - The Sun's Fate (1:48)

Like other stars of its type, our Sun will eventually become a planet-engulfing red giant.

Destiny - Future Earth (1:51)

Over the next few billion years our planet will gradually become inhospitable for life.

Giants - Outer Planet Probe (3:34)

Scientists' long-held dream of a satellite space flight to the outer planets came to fruition during a rare planetary alignment in 1977.

Life - Surveying the Solar System (3:53)

The first extra planetary probes report that our closest neighbors are desolate places.