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TIL in 1054, Chinese astronomers noted a bright "guest star" in Taurus that was visible in the daytime for 3 weeks and didn't completely fade out for almost two years. The "guest star" was actually the supernova explosion that created the Crab Nebula, which is located some 6,500 light-years away.

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ylYM TIL LeBron and MJ are the only players to win a regular season MVP, NBA Finals MVP, and an Olympic gold medal in the same year.
pYnYO TIL eVscope users have the ability to participate in Citizen Science efforts led by the SETI Institute. The smart telescope technology (4.5 inch reflector) is sensitive enough to image the transit of exoplanets and the occultation of a star by a Trojan Asteroid
n8Vd TIL At birth, Halibut have an eye on each side of the head, and swim like a salmon. After six months, one eye migrates to the other side, making them look more like flounder. At the same time, the stationary-eyed side darkens to match the top side, while the other side remains white.
eeAb TIL that the DNA within each cell is almost 2 m long, but it is constrained in no more than 0.09 mm
wLNXo TIL that chickens have earlobes, and the color of a hen's eggs corresponds to the earlobe color.