Agent McArdle apprehends a fleeing illegal immigrant and other agents arrive to assist.
(00:41)Leading the expedition is Dr. Enric Sala, a National Geographic Explorer and research scientist at Spain’s National Council.
(00:32)The team brave treacherous conditions in a search for missing submarines from World War 2.
(00:30)Power, luck, medicine, aphrodisiacs, delicacy. Tigers are on the verge of extinction. Is the death of a majestic animal worth it?
(00:51)Bryan Penprase discusses the locations of the ancient equinoxes in Casa Rinconada.
(00:45)From the air and on the ground, three components of CBP work 24/7 to defend a 51 kilometer long stretch of the border.
(00:46)CBP agents take illegal immigrants to the station to get processed.
(00:34)From the air, CBP agents chase a runner through the desert.
(00:50)The Shark team are hoping for one more big catch as the expedition draws to an end.
(00:29)Chris Fischer is an expert at catching and releasing the kind of fish that get away.
(00:28)Almost 50 of the cities retired subway cars are now home to millions of fish!
(01:00)Will this super car pass the crash-test?
(00:38)This jet outruns the speed of sound.
(00:43)The Dive Detectives unlock the secrets of a "ghost ship".
(00:30)Will the Dive Detectives find a century-old missing gunboat full of precious cargo?
(00:30)Nature lovers, not hunters: find out why the Massai carry their own weapons.
(00:24)The Researchers conclude that Bigfoot´s height is 1.4 meters. How could this be determined
(00:36)A near midair collision results in a crash in the Amazon and an improvement to on board collision avoidance systems.
(00:29)Robots toiled 3km under the sea to build the longest sub-sea pipeline in the world, connecting the UK and Norway.
(00:36)The opposing forces known as Dark Matter and Dark Energy have the capacity to rip apart the universe atom-by-atom.
(00:35)