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From Scientific American:
A lifetime is very long relative to the picosecond it takes for two atoms to form a molecule, but it is the blink of an eye compared to many natural phenomena, from the rise of mountain chains to the collisions of galaxies. To answer questions that take more than a lifetime to resolve, scientists hand their efforts down from one generation to the next. In medical science, for example, longitudinal studies often follow subjects well after the original researchers have passed; some studies that are still ongoing started as far back as the 1920s. The record for the most extensive sequence of uninterrupted data gathering in history may belong to the ancient Babylonians' Astronomical Diaries, which contain at least six centuries' worth of observations from the first millennium B.C.; those records have revealed recurring patterns in such events as solar and lunar eclipses.
Read the whole article
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