"Things You Wouldn't Know If We Didn't Blog Intermittently."
02 March 2010
"At the time, the gyroscopes were the most nearly spherical objects ever made. Approximately the size of ping pong balls, they are perfectly round to within forty atoms (less than 10 nm).
If scaled to the size of the earth, the tallest mountains would be 2.4 m (8 ft) high
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