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TIL That teen pregnancy rates are actually at their lowest since the 1970s.
TIL all mammals have nearly identical hearts. other than scale, the heart organ hasn’t been affected by evolutionary adaption amongst mammals
TIL that humans can reliably identify, by smell, blood relatives - but not husbands or wives. Preadolescent children can detect their full siblings but not half-siblings or step-siblings.
TIL that acetaminophen (paracetamol) reduces the pain of social rejection
TIL that the USA has the highest cancer survival rates of any developed country, despite no universal health care
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