National Geographic HD Nepal is hit by a 6.7 mega-earthquake that kills thousands; across the country, survivors are hit by terrifying avalanches that destroy everything in their path; presenting stories of survival, from the Kathmandu Valley to Mount Everest. 2026-09-28 Exploring various catastrophes that have happened in mankind's quest to conquer space, from the Apollo 1 tragedy to the Challenger and the Columbia disasters. 2026-09-28 When a dam fails, catastrophe follows; history's 10 worst dam failures. 2026-09-28 Trains, planes, and ships collide; exploring ten global collisions. 2026-09-28 Witness the 10 worst sports crashes from the high-risk world of sport racing. 2026-09-28 Ten of history's worst maritime disasters at sea. 2026-09-29