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TIL A sleeping Killer Whale (Orca) pod (approx. 6-30 whales in a pod) breathes in unison - they form a tight circle, then surface for air and re-submerge as one, while sleeping!

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jmBa TIL that the checking account was invented by the Knights Templar in the 12th century. Crusaders would deposit their valuables with the Knights before journeying to the Holy Land, and would receive a certificate entitling them to items of equivalent value upon their arrival.
BgxKr TIL The South Atlantic Anomaly is an area where the Van Allen radiation belt is closer to the earth's surface (200km from the surface). The SAA has caused false solar flare alarms, led to the destruction of the Hitomi telescope, and crashes laptops.
ZajR TIL that a man named James Harrison who is also known as the man with golden arm has donated blood more than 1000 times which has saved more than 2 million unborn babies from Rehsus disease.
D1BxD TIL scientists found Bees Wax fillings, one of the earliest known forms of dentistry, in Neolithic teeth from 6,500 years ago. The jawbone was discovered in 1911 but nobody noticed the fillings until recently.
PYNDO TIL that born-blind people actually dream of visual content. That's because auditory and tactile inputs can create virtual images in their brain, and that images can be revealed in their dreams.