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TIL Saudi Arabia promotes practice of marriage between close relatives which has produced high level of several genetic disorder including thalassemia, sickle cell anemia, spinal muscular atrophy, deafness and muteness.

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Y7XjP TIL Romans used cannabis and opium, and mixed opium with flowers or resin to make it weaker. Ancient physicians understood the addictive nature of these drugs and knew that opium overdose would lead to death.
pEMO TIL that an African man won a court case in the 1650s that let him keep another African, John Castor, as his slave. That means that the first legally recognized owner of a permanent slave in America was an African man.
j5mX TIL that mathematically there are more possible games of chess than there are atoms in the Observable Universe.
lvXr TIL The first Memorial Day was a funeral held by freed slaves for Union soldiers who liberated them after the American Civil War in 1865
ObOa TIL that The United States Department of Agriculture says a sandwich must contain at least 35 percent cooked meat and no more than 50 percent bread