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TIL that scientists have engineered micromotors powered by bacteria and controlled by light

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nepp7 TIL of Joy Milne, a “super-smeller” who found she could smell a unique odor on people with Parkinson's disease years before the onset of symptoms. Scientists then isolated biomarkers in sebum (oily substance from face/back) of Parkinson’s patients, paving the way to earlier detection/treatment.
OoNGg TIL I learned that Zepellins can only carry about 20 or so passengers
KOkVE TIL in the song "9 to 5," Dolly Parton created the typewriter sound effect by tapping her acrylic fingernails against one another.
oBKBE TIL in 2004 a man had his head brutally smashed with an axe on his sleep. He woke up like normal and adrenaline kept him up as he did his routine. He used the sink,did dishes and made breakfast while bleeding out. He was locked out while picking the newspaper and died trying to find the spare key
OLr6 TIL there was a man-made mouse utopia called Universe 25. It started with 4 males and 4 females. The colony peaked at 2200 and from there declined to extinction. Once a tipping point was reached, the mice lost instinctual behaviors. Scientists extrapolate this model to humans on earth.