Believe it or not, astrobiologist Penny Boston is searching for life on Mars by dropping deep into this heart of darkness. This is a lava tube, a subterranean cave formed by underground lava flows during volcanic eruptions that occurred thousands of...
Back at the Armor Group compound, another team prepares for a different kind of mission. They'll travel low profile, trying to blend in with the Iraqis. Low profile certainly can be an awful lot safer. If faced down properly, people will not know, th...
Jesse Marcel remains convinced that there was one thing in the debris that could only be extraterrestrial. He described small metal-like I-beams with hieroglyphic symbols. The metal beam like our small miniaturized I-beam, and had these perplexed vio...
Redwoods are the tallest living trees on the planet. And one of the best places to see them is northern California's Redwood National Forest. They can reach 300 feet high or higher, and their massive trunks can grow to more than 20 feet wide. Recentl...
Here in the Timor Sea off northern Australia, take a look at a creature that seems to have the soul of a riverboat gambler. It moves through turf dominated by large hungry predators, and it fights these predators in a way that will astound you. This...
He began his career as a Baptist preacher but went on to lead a sweeping grassroots effort to end racial discrimination, known as the Civil Rights Movement. Along the way, Martin Luther King Junior made history and emerged as one of the most influent...
Identicals share one of the closest human relationships biologically. They are likely to grow up looking and sounding extremely similar, yet not a 100% match. A small number of genes in the mother's eggs sit outside the nucleus, known as mitochondria...
Deep in the jungles of Guatemala lie the ruins of a lost Maya civilization. The culture thought of as the classic Maya flourished across Central America between 250-900 AD. But archeologists are now discovering a Maya society that existed a full thou...
The lady, she has two small dogs and she was worried because the alligator finds the back of her house and just gets up there and he sounds itself and lays out there. She tries to chase him off and he don't move, because he opens his mouth. So she's...
They're the big, hairy spiders of our nightmares. And it's no wonder we are afraid. Tarantulas are the biggest of all the arachnids. These spiders are killing machines perfectly adapted to their habitats. And the biggest and battiest of them all is t...
