› added 7 years ago

215

TIL 2.1 million people still use AOL 56k dial-up in the US.

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xVN7k TIL: The US bought Alaska from Russia in 1867
ADPBa TIL the Tamaskan dogs are a finnish crossbreed made to resemble wolfs, with their thick coats, straight bushy tails and gray wolf fur color. Despite their lupine appearance, they are a recognized dog breed, and can be trained as therapy dogs.
P15lJ TIL in 1962 Nick Holonyak Jr. invented & first demonstrated a semiconductor laser diode that emitted visible light which was the forerunner of the first generation of commercial LEDs. In addition, 10 of his 60 former doctoral students have since developed new uses for LED technology.
9wYmD TIL: Ordinary ice is called ice Ih, because it has hexagonal crystals. But if you cool it below -37 °C, scientists believe it will gradually turn into a cubic form, called ice Ic.
M7eEV TIL The American Dental Association supports chewing sugarless gum since it increases salivary volume and flow, thus protecting against cavities.