Discovered in 1942 at around 16,000 ft above sea level, a frozen lake was found to be full of skeletons. It was clear something terrible had happened - it was war time so it was thought to be Japanese soldiers dying of exposure while invading India. It was difficult to date the remains due to the dry, cold air, but they appeared to be from 850 AD. They all died from blows to the head by round objects. A folk song tells of a goddess who rained death on pilgrims with “hard as iron” hailstones.