Beehive tombs, or tholoi, are the large, underground ceremonial tombs constructed in Greece during the Late Bronze Age. The tombs, usually built into the side of a hill, have a distinctive beehive shape formed with layers of stone that taper toward the top of the structure. Though many of these tombs have been pillaged, they have still provided archeologists with some of the richest finds from the period. What might the abundance of such tombs at certain sites reveal about who used them?
The U.S., now the world's most anxious country, is as safe as ever. - Historical 70% decline
Ejection seats are used in aircraft to quickly propel occupants out in an emergency. Today, they are fired by an explosive charge, but the first ejection seats were powered by compressed air. One of the first aircrafts to be fitted with such a system was the German Heinkel He 280 prototype jet fighter. While testing the He 280 during WWII, pilot Helmut Schenk became the first person to use an ejection seat to make an emergency escape from an aircraft. What went wrong during his test flight?