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TIL that four times more people speak English as a second language (roughly two billion) than as a native one (approximately 350 million).

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YpKyB TIL Shoveling snow is a known cause for heart attacks - the increase in blood pressure combined with cold air constricting arteries creates the right environment for it to happen.
69Ngm TIL The vampire from the 1922 film, Nosferatu, has appeared in multiple episodes of SpongeBob Squarepants. He works the night shift.
E19lx TIL that one liter of tap water in most of Southern California has enough calcium to provide up to 10% of your daily calcium intake.
6JaZ TIL two tools aboard both the Spirit and Opportunity rovers, designed to grind rocks for examination, are made of recycled aluminum from the World Trade Center, recovered after 9/11. Honeybee Robotics, whom constructed the tools, were located in Lower Manhattan, just a mile away from ground zero.
Xedj TIL American pianist Keith Jarrett supplies cough drops to audience members to keep them quiet during performances