Satellite photos reveal gigantic outburst floods

Researchers have studied satellite photographs of Lake Catalina, an ice-dammed lake in East Greenland — and were truly amazed: Unnoticed by science as well as people living in the area, the lake has been the source of four major outburst floods over the last 50 years — each representing an astounding mass of energy, equaling up to 240 Hiroshima-bombs, report investigators.