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TIL sperm oil(whales) was used in automotive transmissions until the 1970s. When they stopped using it, transmission failures rose significantly.

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0d48A TIL Carrie-Anne Moss, Trinity in Matrix trilogy, also took a part on a TV Series called Matrix (1993) about an assassinated hitmen who stuck in between worlds and given a second chance to redeem himself in the real world by helping others.
jlLn TIL back in 2007 a Company Named Their MP3 Player the “I.Beat Blaxx”
a8dyM TIL: Leonardo da Vinci designed scuba gear for sneak attacks on enemy ships from underwater. The leather suit was equipped with a bag-like mask that went over the diver’s head. Attached to the mask around the nose area were two cane tubes that led up to a cork diving bell floating on the surface.
M0nb TIL That America has only been at peace for 21 years since 1776.
5VBGD TIL the medical term for a unibrow is "Synophrys", and can be a symptom of several genetic disorders ranging from learning difficulty (moderate to severe), to having fewer fingers or toes than normal, malformed limbs and facial anomalies.