How Do They Do It?
An insider's look at the engineering and scientific miracles behind the things that form the modern world.
12. Airplane Parachutes, Solar Power, Photochromic Lenses
0.0Sep 24, 2009 · 22 min
How do they use explosive rockets to catch crashing planes in mid-air and how do sunbathing techniques help scientists catch rays of sun? Plus, the shady secrets of sunglasses.