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TIL the term for bad breath, halitosis, was popularised by Listerine to sell more mouth wash. Also that Listerine used to make cigarettes!

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kJged TIL that engineers proved that leaving the air conditioning on when you’re not home actually can save energy over setting your thermostat up high and making the A/C work hard when you get home after work
R7R9w Let’s say you’re doing 100 mph in a car and suddenly a downed tree, stopped the car, or person appears in the road up ahead and you need to slam on the brakes. How much more dangerous is that situation than when you’re doing 70 mph? Your intuition might tell you that 100 mph is only 30% more than 70 mph. But as this video shows, the important factor in stopping a car (or what happens to the car when it collides with something else) does not speed but energy, which increases at the square of speed. In other words, going from 70 mph to 100 mph more than doubles your energy…and going from 55 to 100 more than triples it.
1annD TIL in 139 episodes of CHiPs, Ponch and John never drew their guns, and only three guns were drawn in the entire run of the show
mxj8y TIL that The Who’s Roger Daltrey is allergic to cannabis, which affects his singing. On one occasion he threatened to stop a show due to people smoking, advising them to “stick it up your fuckin’ ass.”
W7Xj4 TIL that SOS never actually stood for anything, but instead was a Morse code distress signal that used these letters since they were easy to signal