Astronaut Mark Watney introduces the Ares 3 crew before their mission launch.
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310 mph / 500 km/h
Posted 8 years ago by techman in category: technology   Comments (2)



Smarter Every Day - Prince Rupert's Drops are toughened glass beads created by dripping molten glass into cold water, which causes it to solidify into a tadpole-shaped droplet with a long, thin tail. These droplets are characterized internally by very high residual stresses, which give rise to counter-intuitive properties, such as the ability to withstand a blow from a hammer or a bullet on the bulbous end without breaking, while exhibiting explosive disintegration if the tail end is even slightly damaged.
Posted 3 years ago by kurdt in category: geeky   Comments (0)


American physicist
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