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TIL When charging car battery, connecting positive to negative and negative to positive could result in damage to the alternator or even an explosion.

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MaZb TIL WWI Canadian ace William Barker passed out twice during a dogfight with a German squadron, once after being shot through both legs, and again after having his left elbow shattered. Despite being outnumbered and badly injured, he shot down four enemy planes, escaped, and survived crash landing.
nw9r TIL a man who was lost in the woods chopped down some power lines so that workers would have to come and rescue him.
WjDo TIL it’s impossible to smoothly scan your eyes from left to right (or vice versa), except if you’re tracking a moving object. Otherwise, your vision jumps from focus point to focus point, even while reading.
QNEjp TIL about "Bathing Machines" ... Portable Huts that, in the 18th and early 19th-Centuries, were rolled into the ocean to allow bathers to "changes into whatever shapeless sack was deemed suitable at the time" to go swimming.
KLJ TIL the Coriolis Effect can be visualized on a merry-go-round aka roundabout, by throwing a ball to a fellow rider directly across from you. To him it will appear to curve opposite of the way you are spinning, although to a viewer not on the merry-go-round it appears to fly straight.