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TIL Researchers in Tokyo have developed a mirror that tweaks the viewer’s reflection in real-time to make it look like they’re smiling. The projected application for this tech is for use in shopping mall bathrooms, in hopes that happier shoppers will buy more.

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P0dE TIL that the most common hypothesis for the cause of motion sickness is that it functions as a defense mechanism against neurotoxins. When feeling motion but not seeing it or vice versa, the brain will conclude that the discordance is due to poison ingestion. It then responds by inducing vomiting.
eWjE TIL that China used more cement in the last three years than the US used in the entire 20th century
EjNP TIL although Iceland is considered politically as part of Europe, it is geographically North American and European at the same time, due to the fact that half of Iceland belongs to the Eurasian plate and the other half to the North American plate.
X01DP TIL that the U.S. state with the highest STD rate is Mississippi, with a rate of 1,291.4 STD cases per 100,000 state residents.
NX5ab TIL Much of Thespis (Gilbert and Sullivan's first opera) has been lost. The little music that has survived largely comes from Sullivan recycling his material, Climbing Over Rocky Mountain was later used in The Pirates of Penzance and the ballet was likely reused for the French The Mikado.