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TIL that the blue jay can be beneficial to other birds, as it may chase predatory birds and will scream if it sees a predator within its territory. It has also been known to sound an alarm call when hawks or other dangers are near, and smaller birds often recognize it and hide.

lokxB TIL that the Chicxulub impact crater (from the asteroid that killed the non-avian dinosaurs) can be seen today as a series of sinkholes. The buried rock on the rim of the crater redirects groundwater that causes the limestone above it to dissolve and form sinkholes called cenotes.
eprRb TIL that Alberta King, Martin Luther King Jr's mother was shot and killed while playing the organ at a church service. Her killer was sentenced to death, however, the King family—consistent in their commitment to nonviolence—successfully campaigned to have his sentence commuted to life in prison.
4k85b TIL that one of the most popular stars of the silent film era in Hollywood was a Japanese man named Sessue Hayakawa. His “broodingly handsome good looks” made him a “heartthrob for American women”.
JYEWV TIL the Boston Museum of Fine Art has a fragment of an egyptian ivory box that has the name of the woman called benerib, the queen consort of first dynasty pharaoh hor-aha. The name benerib can be translated as "sweetheart" and is thought to be an ephitet than a name.
woDG1 TIL When musician Prince died, he left behind a vault containing nearly 8,000 unreleased songs but he had forgotten the combination. Measuring 6 1/2 feet tall, several feet wide, and weighing 6,000 pounds, the massive vault required a professional safecracker to break into it