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TIL that Teddy Roosevelt survived an assassination attempt while campaigning and went on to give an hour-long speech with a bullet lodged 1/4 inch from his heart before going to the hospital

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EgPed TIL that the reason crystals and rocks feel cold to the touch is that they have "high thermal inertia". In other words, a rock that sits on a table in a 24°C room will want to take in heat from our 36.8°C bodies,.. and that feels cold. Once it has gained that 12.8°C it does not feel cold any more.
pYdZp TIL the 7-Eleven convenience store's name dates to 1946, to reflect the stores' new 7 am to 11 pm hours of operation, which were unprecedented at the time.
GDA1 TIL that radiotrophic fungi exist which can transform gamma radiation into chemical energy. They were found inside the Chernobyl nuclear plant.
W4yo TIL that in 1912 criminologist Arthurt MacDonald suggested making it a misdemeanor to name assassins publicly, stating that “This would lessen the hope for glory, renown or notoriety, which is a great incentive to such crimes.”
v1yMr Jerk drivers who merge at the last minute are actually more efficient. However, they are still jerks.