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TIL that an XY genetic male was born with a womb, and was able to give birth to twins

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kO08d TIL that early psychologists, having few examples to demonstrate mental illness in humans, would sometimes invoke in court proceedings Shakespeare characters such as King Lear and Hamlet as types of human madness
neYN9 TIL that cavities are contagious. Activities like kissing and sharing drinks can transmit the bacteria Streptococcus mutans and when combined with other factors this can lead to cavities.
6W6Q TIL that the average IQ of someone from 1900 would have been between 50 and 70 by today’s standards. This is attributed to the growing complexity of society, and the increased need for hypothetical and abstract thinking in our everyday lives.
4XQN5 TIL boiled potatoes contain a protein called proteinase inhibitor 2 (PI2). This protein may suppress appetite which is what makes everyone feel full.
grmYA TIL It's possible to bring back some extinct animals. In 2016, some ecologists from UCSB advised which species should be revived to best impact Earth's ecosystems. The species that made the cut: Christmas Island pipistrelle bat, Reunion giant tortoise & Lesser stick-nest rat.