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TIL the Japanese bullet train system is equipped with a network of sensitive seismometers. On March 11, 2011, one of the seismometers detected an 8.9 magnitude earthquake 12 seconds before it hit and sent a stop signal to 33 trains. As a result, only one bullet train derailed that day.

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d8rjd TIL that the clicking noise sperm whales use to communicate is so loud that it can be heard by other whales thousands of miles away and can make a human body intensely vibrate to the point of death.
epErL TIL in 1973, José Luis de Jesús Miranda claimed to be the Messiah and started a church that reportedly gained 2 million followers in 30 countries. After a divorce, $46,000 in gambling debt, and claiming he was the Antichrist, he died August 8, 2013. His church denies the death and still carries on.
yVZkV TIL Breaking Bad aired just 2 years after Malcolm in the Middle ended. Bryan Cranston was playing a character named Hal in a sitcom, two years before playing a drug kingpin character in Breaking Bad.
4GPo TIL Medieval Castles went up in a clockwise spiral to give defenders a sword fighting advantage
rRL7o TIL: Encyclopedia Britannica was the oldest continuously published reference source in the English language. The last printed edition was published in 2010. The publisher was at that time 244 years old.