From: National Geographic Channel on Sat, Feb 20 2010 2:31 AM

On their long, arduous journey toward Emily’s egg, sperm finally get a little bit of rest in her fallopian tubes.

From: National Geographic Channel on Sat, Feb 20 2010 2:30 AM

Sizing Up Sperm uses real people to represent 250 million sperm on their marathon quest to be first to reach a single egg.

From: National Geographic Channel on Sat, Feb 20 2010 2:30 AM

Sizing Up Sperm uses real people to represent 250 million sperm on their marathon quest to be first to reach a single egg.

From: National Geographic Channel on Fri, Feb 19 2010 2:34 AM

Satellite imagery reveals secret nuclear facilities in Iran. Physicist, Richard Muller, tells us how the images are created.

From: National Geographic Channel on Fri, Feb 19 2010 2:30 AM

In Wiltshire, England, crop circles abound — but can these mysterious formations stand up to science?

From: National Geographic Channel on Fri, Feb 19 2010 2:30 AM

In Wiltshire, England, crop circles abound — but can these mysterious formations stand up to science?

From: National Geographic Channel on Fri, Feb 19 2010 2:27 AM

To some, they’re artists. To others, they're hoaxers. A group of crop circle makers begins work on an elaborate design.

From: National Geographic Channel on Thu, Feb 18 2010 2:22 AM

What if a mega hurricane came blasting through Manhattan? Could we diffuse the giant killer?

From: National Geographic Channel on Thu, Feb 11 2010 1:36 AM

Electromagnetic propulsion could send a spacecraft farther and faster into space than any propulsion system known to man.

From: National Geographic Channel on Thu, Feb 11 2010 1:34 AM

Masters of self-defense use all of their senses when fending off an attack, making it possible to fight in complete darkness.

From: National Geographic Channel on Sun, Feb 07 2010 1:12 AM

Saturn may look like a serene beauty on the outside, but on the inside, the planet is seething with complex weather patterns.

From: National Geographic Channel on Sun, Feb 07 2010 1:12 AM

Saturn may look like a serene beauty on the outside, but on the inside, the planet is seething with complex weather patterns.

From: National Geographic Channel on Sun, Feb 07 2010 1:11 AM

Sometimes the simplest techniques can make the difference between life and death.

From: National Geographic Channel on Sun, Feb 07 2010 1:11 AM

Sometimes the simplest techniques can make the difference between life and death.

From: National Geographic Channel on Sat, Feb 06 2010 1:10 AM

Jupiter’s magnetic field is a radiation hot zone of staggering intensity.

From: National Geographic Channel on Sat, Feb 06 2010 1:10 AM

The Cassini-Huygens spacecraft sets off on an orbital tour of Saturn, sending back some out-of-this-world images.

From: National Geographic Channel on Fri, Feb 05 2010 1:08 AM

What would it be like to descend to the surface of Pluto?

From: National Geographic Channel on Fri, Feb 05 2010 1:08 AM

The New Horizons spacecraft is set to reach Pluto in 2015, giving us our first glimpse of this faraway world.

From: National Geographic Channel on Fri, Feb 05 2010 1:08 AM

When Pluto’s status as a planet is revoked, the public protests.

From: National Geographic Channel on Fri, Feb 05 2010 1:08 AM

Venus has been tortured by fire. Over 1600 giant volcanoes puncture its surface.