Nat Geo HD

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Discover the story behind peanut butter cups and their butterscotch coating, then learn how to make three million cakes a year. RATING: AA.

Discover how an eco-minded cereal gives back to the iconic bird it's named after, and take a look at how bagel crisps are made each year. RATING: AA.

Secrets Of The First Emperor's Tomb: Join Sam and his team as they use brand-new laser drone technology to uncover what lies inside the never-opened tomb of the First Emperor. U. (2 of.

Secrets of the Tower of Babel: Archaeologists discover new evidence in Iraq that sheds light on the historical influences of the Bible's epic Tower of Babel story. 7+. (2 of.

Experts scrutinise theories behind the strange disappearances in the Bermuda Triangle. What could have caused ships and planes to vanish in this part of the Atlantic.

They disappeared without a trace or a soul to tell their tale. Shipwrecks so mysterious, their fate became the stuff of legends, until now. U.

Paleoanthropologist Ella Al-Shamahi begins to unravel the extraordinary truth behind the legend of Tutankhamun, investigating the 'pharaoh's curse'. U. (1 of.

Ella Al-Shamahi dives deeper into the truth behind Tutankhamun's curse - can modern science can explain a number of the deaths attributed to it? U. (2 of.

... Mysteries. Experts investigate the world's biggest sunken mysteries, including an intriguing WWII battleship and Flight 19, which vanished in the Bermuda Triangle. RATING: AA.

Italy's Morandi Bridge was an engineering marvel - until it was a national embarrassment. Plus, as impressive as billboards are, they can really come down hard. 7+.

The Hindenburg: It was the largest and most celebrated airship ever built, but on 6 May 1937 it caught fire, killing 36 passengers and crew. What caused the tragedy? RATING: AA.

Landing at one of the world's most challenging airports, a passenger plane comes in like a fighter jet, skids off the runway and bursts into flames. RATING: NU.

Straight after takeoff, Air Florida flight 90 stalled and plunged into Washington's Potomac River. Experts examine what caused the catastrophe. All Ages.

Documentary exploring the horror of the final year of WWII and the infamous Panzer elite division that perpetrated huge massacres on the Eastern Front. (1 of 2) RATING: NU.

Documentary exploring the horror of the final year of WWII and the infamous Panzer elite division that perpetrated huge massacres on the Eastern Front. (2 of 2) RATING: NU.

Idris Elba unearths the stories of three heroes - these men were part of the only all-black combat unit to land on the Normandy beaches on D-Day. (1 of.

Approaching Taipei in an intensifying electrical storm, China Airlines Flight 676 falls out of the sky, killing all 196 people on board. But why? U. (10 of.