Machu Picchu is a spectacular sight, but its location meant considerable hardship for builders. Heavy rainfall and earthquake t...
(02:59)The theological implications of this important biblical document are explored by scholars and scientists.
(01:04)Yves Rossy wheels his jet-powered wing to the ‘launch’ plane at Calais in readiness for his historic flight.
(01:44)Did aliens really crash in the Brazilian jungle?
(01:13)Could a sighting in the Rockies have something to do with gruesome animal mutilations?
(01:04)Could a major mass sighting in Texas be proof of life on other planets?
(01:15)Ryder, Ben, and James have a little too much fun in alien-inundated Roswell, New Mexico.
(02:49)Rossy crosses the Channel in less than 10 minutes, his parachute opens and he spirals before landing.
(02:30)Go behind the scenes with Chris Barrie during the making of Britain's Greatest Machines.
(03:29)Director of Photography Peter Hutchens and Producer George Kralovansky have some fun with a boom microphone cover.
(01:21)LIGO's (Laser Interferometer Gravitational Wave Observatory) Gabiela Gonzalez discusses gravitational wave astronomy.
(01:07)Without oil, what would happen to our cities? Our food? Our way of life? What would happen to us?
(02:59)Discover the new Earth, where walking from London to Paris is possible.
(03:02)The Air Force replicates the G forces from the fatal skydiving accident.
(02:46)Just how powerful were the waves that knocked Hugh off a cliff?
(02:27)Can the team find any evidence of aliens hiding in the Brazilian jungle?
(02:58)What is actually flying over the skies of south Florida?
(02:05)The team heads to Arizona to investigate one of the most famous sightings in history.
(01:01)Is a secret military base in California covering up evidence of UFOs?
(00:49)An actor dressed as a reporter gets mall shoppers to believe some tall tales.
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