National Geographic on PBS

The "saltie" has the most powerful jaws since T-rex and unexpected intelligence.

In 1994, NASA's Clementine spacecraft orbits the Moon more than 300 times, sending back stunning images of the lunar surface, before heading out to the asteroid Geographos.

NBC's Roy Neil remembers Wernher Von Braun, a German engineer who built terror rockets for Hitler and then helped lead the United States to its leadership in space.

A full Moon has long been thought to effect human behavior, but in 1982, there is still a lack of scientific evidence and professional research to support "lunatic" theories.

Dr. Neil deGrasse Tyson of the Hayden Planetarium talks about the possibilities of their being other forms of life in our universe.

On its way to Jupiter in 1992, NASA's Galileo space probe circles the Moon, sending back close-up images of the lunar surface; the new pictures provide more data on the Moon's geologic features and chemical composition.

Agents locate a sophisticated smuggling tunnel hidden below the streets of Nogales.

There are lots and lots of guns in the United States, and this is one place to get them.

When a group of inmates creates a sophisticated plan to bust out of Sterling Correctional, a Special Ops team takes action.

Leroy Brown won't let Marc leave the house. And when Marc gets frustrated, it only gets harder.

DEA investigators inspect a semi-submersible designed to transport hundreds of millions of dollars worth of cocaine undetected.

Cataracts have blinded Lake, a sweet retriever mix. Dr. Patti hopes surgery will help restore at least some of her sight.

After an expensive restoration, it's time to put the Amphicar to the test - drive it right into the water!

For 30 years, Alan Barges was eating himself to death. Now he hopes to live an active life again one day.

Border patrol agents pursue a group of illegal immigrants moving through the desert at night.