UsefulBS
Straight facts. Answers to questions you never knew you had.
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Why do slot machines use fruit symbols because they were originally designed to dispense fruit-flavored chewing gum?
Fruit symbols on slot machines originated in the early 1900s when anti-gambling laws forced manufacturers to dispense chewing gum instead of cash prizes. The icons represented the various gum flavors available, such as cherry and orange, while the iconic BAR symbol was modeled after the logo of the Bell-Fruit Gum Company. This clever pivot bypassed legal restrictions and created a lasting design tradition that persists today.
Why was the chainsaw originally invented as a surgical tool to assist doctors during difficult childbirth?
Chainsaws were originally invented in the late 1700s by two Scottish doctors as a medical tool for symphysiotomies. Designed to facilitate difficult childbirths, the hand-cranked device allowed surgeons to cut through pelvic bone and cartilage more quickly and efficiently than traditional saws before later evolving into a woodworking tool.
Why was a popular oil paint pigment called Mummy Brown actually made from ground up ancient human remains?
Mummy Brown was a popular pigment used between the 16th and 19th centuries that was literally made by grinding up ancient Egyptian human and feline remains. Artists valued it for its rich transparency and fleshy tones, but the pigment fell out of use as painters became aware of its morbid origins and the supply of mummies eventually became scarce.
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Why do most running shoes feature two extra lace holes at the top that often go unused?
The two extra holes at the top of running shoes are designed for a lacing technique called the heel lock or runner’s loop. This method secures your foot firmly in the shoe to prevent heel slippage and stop your toes from sliding forward and hitting the front, which helps avoid blisters and bruised toenails.
Why do schools of Atlantic herring use high-frequency bursts of underwater flatulence to communicate in the dark?
Atlantic herring produce high-frequency bursts of gas to communicate and maintain school cohesion in the dark. These sounds allow the fish to stay connected at night without alerting predators, as most predators cannot hear such high frequencies.
Why was tomato ketchup originally sold in the 1830s as a medicine to treat indigestion?
In the 1830s, Dr. John Cook Bennett marketed tomato ketchup as a medicinal cure for indigestion and diarrhea, selling it in pill form. This trend persisted until the 1850s when the medical claims were debunked, leading the product to transition from a pharmacy staple to the popular food condiment used today.
Why did people use pieces of crustless bread as the primary way to erase pencil marks for centuries?
Before the 1770 invention of rubber erasers, writers used moist, balled-up pieces of crustless bread to lift graphite from paper. This method was popular for centuries because the bread's soft, sticky texture effectively removed mistakes without damaging expensive writing surfaces.