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TIL that tears cried for different reasons have different structures which are visible when viewed under a microscope.

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WP48 TIL that those tiny bright moving lines that appear in your field of vision when looking at a clear blue sky are actually your own white blood cells moving in the capillaries in front of your eyes’ retinas.
k4nB TIL that Mississippi permits drivers to consume alcohol while driving. However, the driver must still stay below the 0.08% blood alcohol content limit for DUI.
LkAWm TIL there's a place in the coast of Namibia called "Skeleton coast" and nicknamed "The Land God made in Anger" and "The Gates of Hell", that holds the remains of over a thousand shipwrecks and, by land, can only be left by crossing hundreds of miles of marshes and desert.
16xy4 TIL that “elephant-sized” sloths and “car-sized” armadillos once built giant tunnels that still stand today
lJ8a TIL the words hysteria, hysterical & hysterics has the root word hyster, Greek for womb. The ancient Greeks believed women have a wandering womb that would attack their brains every now & then.