January 15, 2005
Travel back in time to look at three of the largest mass extinctions that have decimated life on the planet. What caused these wipeouts?
February 4, 2010
Each year, the moon moves an inch and one half farther away from Earth and is gaining momentum. The gravity it exerts on our plane...Read more
February 11, 2010 • 45m
From Hawaii's volcanoes to Greenland's glaciers to meteorites in Australia, teams of international scientists race to solve the my...Read more
February 14, 2010
Episode 4 of Season 7 premiered on February 14, 2010
February 18, 2010 • 45m
Until recently, there was nothing that could be done about natural disasters like super-volcanic eruptions, meteors striking Earth...Read more
April 1, 2010 • 45m
Scientists reveal evidence of the existence of alien life. Detailed imaging of an underground ocean on a planetary moon and newly ...Read more
April 8, 2010
The famous explosion that took place in Siberia early in the 20th century, known as the Tunguska Event, obliterated everything wit...Read more
April 29, 2010 • 1h
Iceland's Eyjafjallajokull volcano erupted April 14, 2010, spewing aircraft-harming ash over most of Europe. It could cause Katla,...Read more
June 17, 2010 • 1h
Dead Tired uncovers research exploring whether tiredness may lead to heart attack, diabetes, obesity, and depression. In a unique ...Read more
June 24, 2010 • 1h
Cameras offer a rare look inside the Navy's latest weapon in the fight against terrorism: the USS Florida, a guided missile submar...Read more
July 11, 2010 • 1h
This program looks at the remarkable occurrence of the total solar eclipse over Easter Island on July 11, 2010. The program looks ...Read more
July 22, 2010 • 1h
As the sun continues to age, it becomes increasingly hot and begins to expand, eventually swallowing up Earth. The temperatures on...Read more
August 5, 2010 • 1h
Have you ever seen lightning strike from the ground to the sky or float in midair? Spectacular and exotic forms of this natural ph...Read more
November 1, 2010 • 1h
Some believe that man's insatiable desire to alter his environment is actually causing natural disasters. Urban sprawl perhaps str...Read more
November 10, 2010
With most of the planet covered by oceans and overcrowding an issue on land, the time may be right to turn the science fiction ide...Read more
November 18, 2010 • 45m
Recently, paleontologists unearthed the fossilized remains of a 35-foot, 240 million-year-old ichthyosaur in Nevada's Augusta Moun...Read more
December 2, 2010
Scientists study fragments of a meteorite, hoping to gain insight into the origins of life on Earth. Also: a controversial space r...Read more
January 1, 1970
Does evolution really explain how life on Earth began? For decades, critics have attacked Darwin's theory and supported the case f...Read more
August 22, 2010
Imagine a world frozen solid. Imagine that vast sheets of ice hundreds of feet thick encased the entire planet--a giant snowball f...Read more
July 19, 2009
An insider's look at NASA's Constellation program which hopes to establish a human outpost on the moon by 2020.
January 1, 1970
On February 5th 2008 Super Tuesday 57 people lost their lives as 87 tornadoes devastated 5 states. It was Americas deadliest torna...Read more
July 2, 2009
Secret World of Fireworks explores the closely held secrets, recipes, and techniques from the world of pyrotechnic showmen. Nation...Read more