› added 7 years ago

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TIL That people can detect nano-scale wrinkles as small as 13 nanometres while running their fingers upon a seemingly smooth surface. This means that, if your finger was the size of the Earth, you could feel the difference between houses from cars.

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GYdwJ TIL while the Snellen eye-chart is the most common, created in 1862, the Mayerle eye test chart created in 1907 tested acuity, astigmatism, muscular stength of the eyes and color vision
A7ll TIL there was a successful peaceful revolution in Iceland from 2009-2011 where the citizens of Iceland forced their prime minister & his whole government to resign by banging pots & pans. [none of this was televised]
OoOD1 TIL That the Maya civilization used chocolate as money. Chocolate—in the form of fermented and dried cacao beans—was "almost certainly" a key Maya currency. Running out of it may have played a role in their downfall.
4XGVa TIL that Philips lightbulb company has a much more efficient lightbulb that they are not allowed to sell anywhere in the world outside of Dubi; the bulb lasts significantly longer than their other bulbs.
e5mb TIL: The only freshwater seal lives in the worlds largest freshwater lake in Baikal, Russia. “ It remains a scientific mystery how the seals originally came to Lake Baikal, hundreds of kilometers from any ocean.”