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TIL: Black Hole Starships, in theory, can use black holes as an energy source for propulsion. In 2009, a proposal was made by scientists to create an artificial black hole using parabolic reflectors, but science is not advanced enough yet according to critics and there were clear dangers.

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wLjlo TIL orcas can teach themselves to communicate with dolphins. A group of researchers in California discovered that orcas living alongside dolphins changed their vocalizations by adding in more clicks and whistles to match the dolphin’s communication.
KOooG TIL: James Richard Shinn was a master book thief. Using expert techniques and fraudulent documents, he would ultimately pillage world-class libraries to the tune of half a million dollars or more. A detective called him “the most fascinating, best, smartest crook I ever encountered.''
lA9V TIL The death toll of the Halifax explosion would have been significantly higher if not for a lone railway dispatcher. The railyard had evacuated after being warned of the impending explosion, but one man ran back to telegraph halt orders to all inbound trains for Halifax, saving hundreds of lives.
Vp7Q TIL Hans Larsson is a scientist who is trying to reactivate dormant dinosaur traits that linger in unexpressed bird genes. So far, he has managed to create chicken embryos that have teeth and long reptilian tails.
m1WEM TIL that there is a rare condition known as "synesthesia" where people experience a blending of their senses. someone with synesthesia might see colors when they hear music . This phenomenon is estimated to affect about 1 in 2,000 people.