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TIL That most paper sizes are rectangular (A series) is because it is made with a special mathematical property. If you cut it in half on the long side you get two rectangles that are smaller versions of the original.

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PY8Vw TIL of "Hickam's dictum," a counterargument to Occam's razor in the medical profession. While Occam's razor suggests to a doctor that she should assume the simplest solution - a single cause for multiple symptoms, Hickam's dictum states: "A patient can have as many diseases as he damn well pleases."
dLl9 TIL that Shia LaBeouf’s famous motivational speech is part of a compilation where students of a performing arts class wrote speeches for him to read on camera.
wGgM TIL the chains that you can see hanging under school buses and trucks are there to provide traction in snow. With the flip of a switch, the chains will lower automatically and the centrifugal force sends the chains into action. [Video]
YjXr TIL A woman collapsed and lay on the floor of a hospital E.R for 45 minutes as hospital staff ignored her. A janitor mopped the floor around her as she vomited blood. She was then arrested by police for causing a disturbance and died on the stretcher.
7wXr TIL that NASA has discovered stars with temperatures lower than the human body. The star ‘WISE 1828+2650’ is less than 80 degrees Fahrenheit (25 Celsius).