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TIL horses can communicate with humans by pointing to symbols. Researchers trained the horses to understand 3 symbols which meant “blanket on,” “blanket off,” and “no change.” After training they were tested in different weather conditions and researchers found the choices matched the weather.

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yQA48 TIL having a good cry really is good for you. The tears you shed when you cry contain stress hormones, and crying itself may actually stimulate the production of endorphins—the body's natural painkiller—as well as feel-good hormones such as oxytocin.
PY7MG TIL after the Suez Canal was completed, species from the Red Sea used it to migrate to the Mediterranean and became invasive. This phenomenon is called the Lessepsian migration, after the builder of the Canal, Ferdinand de Lesseps
x6v1b TIL you shouldn’t rinse your mouth after brushing your teeth. This washes away all the fluoride, instead, just spit out the toothpaste then go about your day
4XbRa TIL for nearly a century, Jimmy Red corn was used by bootleggers to make moonshine whiskey. The variety nearly went extinct in the early 2000s, but two remaining ears of corn were used to revive it.
GJEJ TIL of 286 scholarly investigations: 221 empirical studies and 65 reviews and/or analyses, that demonstrate women are as physically aggressive, or more, than men in their relationships with their spouses or male partners. The aggregate sample size in the reviewed studies exceeds 371,600.