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TIL The Ambassadors, a portrait by Hans Holbein painted in 1533, contains an anamorphic skull that can only be viewed correctly from a certain angle

p8bBp TIL that more women than men have contributed to our DNA. At some points in human history the ratio is 17:1 that is 17 women reproduced for one man
KOYJQ An extraordinary collection of images from Burns Archive shows the extent to which gas masks were promoted as an essential part of everyday life in the early 20th century. It had been 20 years since the end of World War I, when chlorine gas—and, later, mustard gas—had first been used. The estimates of total casualties from this form of chemical warfare are staggering: 88,000 dead and 1,200,000 injured. With war once again on the horizon, Britain and continental Europe began taking early precautions. In 1938, the British government issued 35 million “General Civilian Respirators”. Everyone from ballerinas to surgeons were encouraged to wear the masks.
KOydE TIL that Roman Emperor Valentinian died whilst yelling at a group of barbarians due to becoming so angry that a blood vessel in his skull burst
dkdB TIL a man who was lost in the woods chopped down some power lines so that workers would have to come and rescue him.
VBRZZ TIL François Delsarte was an 19th century French singing and performance teacher known for his emphasis on expressing emotions and gestures. Delsarte never wrote an official guide to his style and ultimately imitators taught his style as heartless, stereotyped, and melodramatic gesticulation.