Mass hallucinations, top-secret military experiments, naturally occurring phenomena - find out if there are aliens among us.
Images from Prostitution: The Oldest Trade part of the Taboo series.
Check out the men and women who set out to find the world’s most precious metals in hope of earning a fortune.
A look inside Georgia’s maximum security prisons.
Scientist disect the baby mammoth.
An elite group of aerospace engineers and stealth experts rebuild the Horton 229
Could an environmental catastrophe and a volcanic eruption hundreds of miles away really have led to one of the Bible's greates...
Alaska’s brutal weather doesn’t make mining for gold easy.
Cesar tackles two bullying bulldogs whose owners have reached the end of their teethers!
After poor decisions, a visit to a foreign country can turn into a nightmare.
Step on board the Costa Serena and get the low down on one of Europe's largest cruise ships.
Photos from the largest gathering of humans in one place, at one time, on earth.
The amazing men, women and families taking on life’s biggest challenges.
Images from the real-life stories featured in Strange Love.
Photo gallery for Texas Gang War episode from America's Hardest Prisons series on National Geographic Channel.
Explore the multi-billion dollar sex trafficking industry.
Follow the life of three Alaskan mining crews who are looking to strike it rich.
Today, an entire workforce of women is just an internet connection and a phone call away.
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