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TIL that the weird little “spirals” on jet engine turbine tips are so the ground crews can tell if an engine is spinning or not

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E1xQp TIL that North Korea has a VHS copy of Space Jam enshrined in a musuem
E1NLo TIL if two pieces of the same metal were to touch in space, they would bond and become inseparably fused together. This doesn't happen on Earth, because the oxygen in our atmosphere forms an extremely thin film of oxidized metal on every exposed surface.
dD6D9 TIL about the Arabic novel Theologus Autodidactus, (“ The Self-taught Theologian"), which is considered to be one of the earliest Science Fiction stories. Its ‘impact event’ climax ends with a catastrophic doomsday apocalypse. It was written between 1268 and 1277.
vPewB TIL spiders lack leg muscles and instead extend their legs through a hydraulic system powered by their blood pressure. Upon death, the legs curl up due to the loss of blood pressure.
a8jQ0 TIL It began in 1995 with patented Neuticles – testicular implantation for pets - helping neuter hesitant pet owners overcome the trauma of altering and allowing their beloved pet to retain its natural look and self esteem.