Space Shuttle Explosion

In 1986, the U.S. space shuttle Challenger exploded several minutes after launch. A later investigation found that the cause of the disaster was O-ring failure, due to cold temperatures. The temperature at launch was 39 degrees, colder than any prior launch. The cold caused the…

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Survival Analysis

Convinced that he, like his father, would die in his 40's, Winston Churchill lived his early life in a frenetic hurry. He had participated in four wars on three continents by his mid-20's, served in multiple ministerial positions by his 30's, and published 12 books…

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