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TIL men can develop postpartum depression, and it is linked to lower levels of testosterone after the birth of a baby

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5QZk TIL children who speak Mandarin are far more likely to develop perfect pitch because of tone association with words, and that one word can have up to four different meanings depending on the pitch at which it is spoken.
rxG1 TIL The cash register sound effect in The Beatles “Yellow Submarine” was the same used years later in the beginning of Pink Floyd’s “Money”.
REpj TIL that Lee Harvey Oswald defected to the Soviet Union in 1959, only to return in 1962. 18 months later he would assassinate John F. Kennedy.
b96v7 TIL that the US and UK directly interfered with Australian independence, effectively eliminating George Withlam, an advocate who opposed nuclear testing who was democratically elected, with a political coup to install John Kerr in 1975.
XE6xj TIL The space shuttle Enterprise was originally planned to be named Constitution and unveiled on Constitution Day, September 17, 1976, but Star Trek fans convinced President Gerald Ford to name it the Enterprise.