It's the second largest city on earth - and the most important city in Brazil. More than 10 million people live in Sao Paulo. But fitting people isn't a problem. The challenge is the city's trash. Every day, Sao Paulo generates 14,000 tons of garbage -- the weight of the leaning Tower of Pisa. Sa...
Cesar steps in to save a marriage as Patricia and Tyler's dogs don't quite get along. Then, Cesar confronts a family's German Shepherd that's so aggressive, the German Shepherd rescue center wouldn't take him back. And finally, Jake is a loud-mouthed Sheltie that barks at everything, especially d...
Is there really a giant primate running around the world's wilderness areas? Or are Bigfoot and his cousins around the world figments of our imagination? Examine the evidence for yourself with believers and skeptics alike: listen to tales of terrifying encounters, take a look at giant footprints,...
A rash of black bear attacks one Canadian summer has experts looking for answers. Through eyewitness accounts and detailed analysis of the attack scenes, we begin to piece together the puzzle. A bad berry crop the year after a drought is stressing the animals food supply… a spring hunting morat...
We are all defined by our gender, male or female, from the day we are born. In many cultures, crossing from one side to the other, even temporarily, is taboo. We plunge into the lives of people living in the gray area of sexuality. In Albania, we follow a group of "sworn virgins," women who have ...
Crocodiles surround this beautiful island. Dr. Brady Barr and the University of Florida teach some capture techniques.
Oklahoma, USA: Jesse, Marion Kincaid's dog. This image is from Mudcats.
National Geographic Channels/Eric GutierrezIn Seattle, one man has taken to the streets to fight crime as a real life superhero.
Check out the stadiums that were built when South Africa hosted the 2010 World Cup.