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TIL that the average person spends about six months of their life waiting for red lights to turn green.

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via reddit.com

Leb0 TIL there’s an optical illusion that can distort your vision for months, changing the way you perceive colour.
L7Zv TIL the Opportunity rover is still gathering scientific observations and reporting back to Earth after being on Mars for 12 years - nearly 50 times its designed lifespan
QNKjk TIL that during the Vietnam War (1960), the US military formed a unique partnership with dolphins and sea lions, training them to detect underwater mines and enemy divers.
78wPP TIL: The University of Pennsylvania uncovered illustrations with instructions from the 1500s on the use of cats and doves to burn down castles. You strap a sack to the cat, ignite it, and send it to the castle. The plan was part of a manual by artillery master Franz Helm.
aAey TIL that for unknown reasons, during a bidding war with a consortium of tech firms for Nortel’s 6,000 patents, Google bid $1,902,160,540, then $2,614,972,128, and eventually $3.14159 billion (references to Brun’s constant, Meissel–Mertens constant, and pi)