In the final months of World War II, American troops discovered a top-secret facility in Germany with an advanced batwing-shaped jet fighter. If Nazi engineers had had more time, would this jet have ultimately changed the outcome of the war? In this National Geographic documentary they rebuild a jet discovered in a top-secret German facility during the final months of World War II - the Horten 229.

A group of fossil hunters uncover not only the bones of a 77 million year old dinosaur, but its mummified and fossilized 'body'. After excavating the duckbill nicknamed 'Leonardo', scientists begin a battery of tests including a radiographic autopsy. Journey along with a team of paleontology experts as they make several astonishing discoveries including the creature's last meal and never-before-seen internal organs.