When Amelia Earhart took off in 1937 to fly around the world, people had been flying airplanes for only about 35 years. When she tried to fly across the Pacific, she – and the world – knew it was risky. She didn’t make it, and was declared dead in January 1939. In the 80 years since then, many other planes have been lost around the world and never found again – including the 2014 disappearance of Malaysia Airlines Flight 370, over the Indian Ocean.