00:00and found a sealed 30-meter chamber hidden inside it.
00:03Nine years later, no human being has ever looked inside.
00:07The most studied building on planet Earth is still hiding a room the size of a passenger jet,
00:12and nobody on Earth is allowed to open it.
00:14This is the story of the discovery, the theories no one can prove,
00:18and why the pyramid of Pharaoh Khufu refuses to give up its last secret.
00:2345 centuries ago, a king named Khufu ruled Egypt at the height of the Old Kingdom.
00:29When he died, around the year 2560 before Christ,
00:33his people raised him a tomb that would remain the tallest structure built by human hands for nearly 4,000
00:39years.
