› added 10 years ago

481

TIL When ignored by that person whose attention means the most to you, the reaction in your brain is similar to physical pain.

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via reddit.com

R7LA1 TIL Our galaxy (the Milky Way) is part of a larger supercluster of 100,000 galaxies named Laniakea that stretches 500 million light years across!
yQb0w TIL Reindeer are the only mammals that can see UV (ultraviolet) light and make sense of it
VQpZ TIL that on an 8x8 chessboard, there are 26,534,728,821,064 ways for a knight to visit every square once and end up back at the square it started from.
ANlgn TIL Diamonds were first discovered and mined in India 3000 years ago. India remained the primary source of diamonds until the 18th century.
XE4yE TIL Due to China’s early discovery and love of ceramics they didn’t produce any glass between the 14th-19th century. This meant they didn’t have mirrors and windows etc, leaving them behind in sciences, as they didn’t make lenses and other things fundamental to science.