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" Blood typing had a second, unanticipated benefit: establishing parenthood. In a famous case in Chicago in 1930, two sets of parents, the Bambergers and the Watkinses, had babies in the same hospital at the same time. After returning home, they discovered to their dismay that their babies were wearing labels with the other family’s name on them. The question became whether the mothers had been sent home with the wrong babies or with the right babies mislabeled. Weeks of uncertainty followed, and in the meantime both sets of parents did what parents naturally do: they fell in love with the babies in their care. Finally, an authority from Northwestern University with a name that might have come out of a Marx Brothers movie, Professor Hamilton Fishback, was called in, and he administered blood tests to all four parents, which at the time seemed the very height of technical sophistication. Fishback’s tests showed that both Mr. and Mrs. Watkins had type O blood and therefore could produce only a type O baby, whereas the child in their nursery was type AB. So, thanks to medical science, the babies were swapped back to the right parents, though not without a lot of heartache. — "
― Bill Bryson , The Body: A Guide for Occupants
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" Just sitting quietly, doing nothing at all, your brain churns through more information in thirty seconds than the Hubble Space Telescope has processed in thirty years. A morsel of cortex one cubic millimeter in size—about the size of a grain of sand—could hold two thousand terabytes of information, enough to store all the movies ever made, trailers included, or about 1.2 billion copies of this book. Altogether, the human brain is estimated to hold something on the order of two hundred exabytes of information, roughly equal to “the entire digital content of today’s world,” according to Nature Neuroscience.*1 If that is not the most extraordinary thing in the universe, then we certainly have some wonders yet to find. "
― Bill Bryson , The Body: A Guide for Occupants