After catching and releasing their first great whites, the team aims to tag a female. But, larger than males and with different migration patterns, will the team be able to land a coveted Big Mama?

They are striking works of art by any standard: but what purpose did they serve? Were Peru's famous Nasca Lines ancient running tracks, runways for aliens or a giant astronomical calculator?

The Mayans predicted WWI, Hitler and the Spanish conquest of Central America. Their final prophecy was a natural disaster of untold proportions on December 21, 2012. Will mankind be wiped out?

After being abandoned by the paid “coyote” guide in charge of smuggling them into the U.S., a group of illegal immigrants in distress contact border patrol for a rescue. The immigrants have been travelling for days in the desert sun with little food or water, and the team must act fast to find them and administer aid. A high-speed chase involving a pick-up truck with illegal immigrants takes a potentially sinister turn after officers learn two young twin girls are travelling with a man who falsely claims to be their father. Back at the port of entry, CBP officers stop a vehicle reeking of gasoline, and find a hidden compartment filled with marijuana inside the gas tank. The smugglers have used a unique tactic to throw off the canine patrol unit, covering the packages with hot sauce in an attempt to confuse the dogs. Officers also stop a vehicle hoping to cross the border into Mexico – with a secret stash of more than U.S. $340,000 inside.