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TIL all San Francisco Municipal Transportation Agency board-members are required to ride transit at least once a week

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vMLK TIL That although liquid water is not a mineral, it becomes one when it freezes since ice is a naturally occurring, inorganic solid with a definite chemical composition and an ordered internal structure.
KOQNE By the 2030s, computer data storage may surpass 1 yottabyte (1024), the largest number with an official metric prefix.
dDYYE TIL that when 13-year-old Ryan White got AIDS from a blood donor in 1984, he was banned from returning to school by a petition signed by 117 parents. An auction was held to keep him out, a newspaper supporting him got death threats, and his family left town when a gun was fired through their window.
Y7a67 TIL The Utah War (1857–1858), or the Mormon Rebellion, was an armed confrontation between Mormon settlers in the Utah Territory and the armed forces of the US government.
4XQjJ TIL in 1963 biologist and animal psychologist James McConnell conditioned planarian flatworms to fear a bright light by electrocuting them. He would then grind up those flatworms and feed them to other worms who had not participated in the experiment. Those worms were afraid of the light.