I have recently been reading the new book by the author of Blink. In it the author argues that 10,000 hours of practice in one skill before early adulthood is necessary for world-class mastery of that skill. That is, name the best athlete, the best artist, the best musician – the best at any human endeavor that requires focus, practice, and skill – then (he argues) that person likely had 10,000 hours of practice by the age ...
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The recent effort to find water ice on the moon has succeeded: