Was it U.F.O.s? Yeti? The K.G.B.? The riddle of who or what killed nine young hikers has inspired conspiracy theories for decades. Two scientists now say a natural disaster may be to blame.

Category: Avalanches
Before Himalayan Flood, India Ignored Warnings of Development Risks
Long before a deadly flood hit two hydroelectric dams, scientists warned repeatedly that such projects were dangerous in a fragile region made more so by global warming.