视频简介
Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。1 "South Island" July 18, 2011 Bear Grylls must fling himself out of a plane and parachute to safety to reach this remote area. Crossing the country's highest mountain range and starting a fire in a waterlogged forest are just some of the unpredictable things he faces in this terrain. 2 "Fire And Ice" July 25, 2011 Bear Grylls is dropped on an ice cap covering an active volcano...。
