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yQp5X TIL "The Very Hungry Caterpillar" was first published in Japan because U.S. printers could not afford the holes and irregular pages.
OoN57 TIL: You can "TAKE YOUR SECRET TO THE GRAVE" without dying. A hollow tombstone in Brooklyn's Green-Wood Cemetery has a slot for depositing papers bearing secrets. (But at your own risk: the artist who says she'll burn the papers has done "performance art" of reading aloud her own dead mom's diary.)
8gZV TIL that one of the primary goals of alchemy - transmuting a base metal into a noble metal - was achieved as early as 1924 when gold was produced by neutron bombardment of mercury.
oRnyY TIL that 41% of cases of antisocial personality disorder, the disorder associated with sociopathy and psychopathy, are hereditary and causes by genetics.
4XlBR TIL most of the Federalist Papers (51 out of 85) that defended the the United States Constitution and lead to its ratification were written by Alexander Hamilton when he was 30 year old. He was also one of the five members of the committee that made the final draft of the original constitution.