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Kris summons the courage to play a little of his own music for rock legend Ted Nugent.

Jamie and Adam test a fan-submitted myth involving 3,000 pounds of building materials, a small car and some twine.

After getting the Russian 82mm mortar up and running, the Red Jacket crew heads out to test it with an HE round against a dummy tank.

As payment for expensive engine work on his "deuce and a half" truck, Will makes a deal to give the mechanic a restored Soviet 82mm mortar.

The same inspector who hit Big Nugget Mine shows up at Porcupine Creek to deliver bad news to the Dakota Boys.

Parker Schnabel shakes off the mine closure and gets right back into action with a golden cleanout that couldn't have come at a better time.

Zeke goes into control freak mode as his frustration with Emily reaches the boiling point.

Will ETs look like us? Will they resemble giant insects? Scientists debate how various environments could have created life forms beyond our wildest imagination.

Bizarre creatures called "extremophiles" are found in some of Earth's most toxic and intense environments. How can studying these life forms help us understand alien life?

Watch as this Frozen Planet film crew gets as close as they safely can to obtain spectacular shots of polar bears and their cubs.

Ariel Tweto and John Ponts blow off some steam by ice fishing. Watch to see what Ariel puts Ponts up to.

Thanks to the largest solar radiation storm since 2003, beautiful aurorae have been popping up across the globe. Martin Berman talks to Discovery News Space Producer Ian O'Neill to understand how the aurora borealis and australis are created.

Will tomorrow's technology render human employees obsolete? Will globalization doom traditional businesses? Join TechStuff's Jonathan Strickland as he explores the future of employment.

During the shooting of the Civil War cannon episode, a greenhorn TV producer walks into the line of fire.

Meet Zeke Tenhoff and his new deckhand Emily Riedel.

Meet Ian Foster and The Sluicey.

Get a firsthand glimpse at footage of an Baghdad sniper attack, and hear from the victim himself how armor saved his life.

Team NAC, consisting of special-effects and prop animation experts, test the water wheel they built for their fire-and-ice-themed chain-reaction machine.

Rocket testing is both dangerous and fun.

Initially hopeful about their rocket, this early test showed Team Aerospace that some additional tinkering would be necessary for their machine to work.

Team T-5 decides to build a catapult as a creative method of releasing the lanterns.

U.S. pennies have been around for centuries, but their days may be numbered. In this episode, Ben Bowlin looks at the arguments for and against the penny. Tune in to learn more about the future of currency.

A space shuttle's camera captured several white blinking dots on film near planet Earth. What are these objects and why were they blinking?

The U.S. Air Force created the Condon Report in 1968 to address supposed UFO sightings. The report stated that "further extensive study of UFO's probably cannot be justified" and is seen by some as an attempted cover up.

James McDivitt, a NASA astronaut and engineer in the 1960's, reported he saw and filmed a strange object in space. Is there a logical explanation or was there really something out there?