› added 11 years ago

255

TIL that this is the oldest known photograph of a human being in existence. This is a busy street and there was tons of traffic, but since the exposure was so long, about 15-20 minutes, none of the moving figures can be seen. Only one man shows up.

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5Y8GB TIL about Festa Confederada, the annual festival of Southern US heritage held in Brazil, originally started by Confederate soldiers and their families who fled to Brazil after the Civil War, where slavery was still legal.
PYgaL TIL duct tape is a recognized & effective treatment for common warts like verrucas. In blind clinical trials duct tape removed warts completely 85% of the time. The success rate for cryogenic treatments was 60%.
JY6ml TIL that Rick Rescorla, the director of security at Morgan Stanley, saved the lives of nearly his whole company on 9/11 by making them evacuate the South Tower as soon as the North Tower was hit, which was against Port Authority orders
PYv8Z TIL the most dangerous frequency is at the median alpha-rhythm frequencies of the brain, 7 hz. At high volumes, infrasound can directly affect the human central nervous system causing disorientation, anxiety, panic, bowel spasms, nausea, vomiting, and eventually organ rupture.
yQNMJ TIL That Americans sought comfort TV after 9/11 and watched so much Food Network that the station had to restructure itself to appeal to a general audience. This led to the creation and subsequent rise of reality cooking shows like Chopped and Iron Chef USA.