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1162

TIL The earliest condoms (16th century) were made of pig intestines and sometimes had sexual illustrations on them.

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d8r7E TIL that the Pledge of Allegiance was compulsory in US schools until a Jehovah Witness Father appealed to the court that saluting the flag in such a manner made it a "graven image," and by forcing his children to do so was an attack on this family's right to freedom of religion and speech.
9YAyG TIL the earliest evidence of hominid murder is 430,000 yr old skull found in the Atapuerca Mountains of Spain. The skull has two distinct holes in the forehead, thought to be from blunt force trauma and was found dumped down a deep shaft in a cave.
P18rJ TIL milk jugs have those circle indentations for structural support, lower production costs and to allow changes in volume.
NmAE TIL that the southern United States converted all its railroads from broad gauge (5 feet/1.524 meters) to standard gauge (4 feet 8 1⁄2 inches/​1.435 meters) in 36 hours starting on May 31, 1886
dJld TIL C-4 is very stable and insensitive to most physical shocks. C-4 cannot be detonated by a gunshot or by dropping it onto a hard surface.