Loch Lomond, 26 years later. Ian Stanley faces the same task he had on top of Fortuna Glacier. He is flying on instruments alone.
(03:00)John Cornett discusses how the telescope he uses is designed to observe the sun's corona.
(01:29)LIGO's (Laser Interferometer Gravitational Wave Observatory) Gabiela Gonzalez discusses gravitational wave astronomy.
(01:07)Bob Ballard reviews some of the finer point on his Hercules ROV (Remotely Operated underwater Vehicle).
(04:49)Bryan Penprase discusses the difference between seeing and observing.
(00:51)The Shark Men have a brand new team but will it get them closer to their goal of an even bigger Great White?
(01:06)Discover how these huge and mysterious shapes, taking days of labour in burning heat, were constructed.
(02:47)Federal officers in Nogales, Arizona, battle illegal immigration, smuggling and terrorism.
(00:59)Federal law enforcement officers battle illegal immigration, smuggling and terrorism.
(01:01)CBP agents and officers battle illegal immigration, smuggling and terrorism.
(01:02)Officers and agents of the Department of Homeland Security work around the clock protecting America's borders.
(01:01)Discover the truth of one of the greatest maritime mysteries: the sinking of the Edmund Fitzgerald.
(00:57)Witness the wild side of nature as we reveal incredible animal behavior.
(00:46)Discover how Hitler's state-of-the-art killing machine the Bismarck now lies at the bottom of the Atlantic Ocean.
(00:58)Is what we know about Jesus' life a result of misinterpretation, historical confusion, folklore and tradition?
(00:52)Did a man called Marco Pole ever exist?
(01:14)Baby jellyfish pulse through the water and will soon grow almost five metres of stinging tentacles.
(01:25)An exiled wild horse tries to join a new group and must fight to prove his power.
(02:22)In the fall, elk gather for a yearly brawl in open clearings.
(02:19)The Chinese Long Sword was a powerful weapon that helped the Qin Dynasty unify China.
(02:56)