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TIL a 2011 study found that playing the vuvuzela in a crowded event was an incredibly efficient way to spread a respiratory virus, over 100 times more than shouting.

Read more ncbi.nlm.nih.gov

via reddit.com

G8O7 TIL the September 11th massacre of 9 AD in the Teutoburg Forest was literally an inside job. The Romans lost over 10,000 to an insider who betrayed them.
MeBnK TIL 3 Ways to Stop Glasses From Fogging Up While Wearing a Mask
gMEE4 TIL of Lucy Ann Johnson, a woman who disappeared in September 1961. Her husband reported her missing in 1965, and he was suspected of her murder. In 2013, Johnson was found alive. She said that she had left because her husband had been abusive.
0deMp TIL there are IKEA stores in China, even as China is the source of cheap furniture the world over.
GAVB5 TIL Human were naturally lactose-intolerant. Tolerant people emerged in Europe starting several thousand years ago while people of Africa, Middle East, and Asian remained intolerant.