Modern Marvels goes beyond the basics to provide insight and history into things we wonder about and that impact our lives.

A fascinating and revealing view of life inside Iran, with NYTimes correspondent Thomas Erdbrink. With humor and curiosity, he shares a rare journey into a private Iran often at odds with its conservative clerics and leaders.

What would happen if every human being on Earth disappeared? This isn't the story of how we might vanish it's the story of what happens to the world we leave behind.

Celebrate 20 years of ANTIQUES ROADSHOW! Travel across six U.S. cities for even more hidden treasures. Then, take a look back at ROADSHOW’s favorite appraisals from all 20 seasons including one find now valued at {dollar}750,000-{dollar}1,000,000.

The series examines each piece of forensic evidence, each witness, each possible lead, and each turn in the road that ultimately leads detectives to their killer.

For two months out of every year, a group of exceptional men find their way to the Canadian tundra to undertake one of the most dangerous jobs on earth.

Mountain Men follows men who have devoted their lives to surviving off the grid in some of the country's most unforgiving terrain.

“PROJECT IMPOSSIBLE” explores epic engineering feats that were once considered unthinkable, but with new advances in technology have become possible. Each episode delves into the construction of man-made structures that are crucial to the planet's future.

If you think there's no such thing as Santa Claus, there are a few hundred very big men who would like to prove you wrong. This film is a cinematic sleigh ride into the strange but true world of the Fraternal Order of Real Bearded Santas, the most elite collection of Santas in the world. Anyone can don a red suit and fake beard to play Santa. These men ARE Santa – all year, every day, and especially on Christmas.

This documentary follows 8 teens and pre-teens as they work their way toward the finals of the Scripps Howard national spelling bee championship in Washington D.C. All work quite hard and practice daily, first having to win their regional championship before they can move on. Interviews include the parents and teachers who are working with them. The competitors not only work hard to get to the finals but face tremendous pressure as the original group...