› added 10 years ago

121

TIL that the F-22 Raptor is so stealthy that the 62 ft. long, 80,000 pound jet’s radar signature is equivalent to a metal marble.

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via reddit.com

4Xeao TIL male bees ejaculate with such force that it rips apart their organs, killing them instantly.
6EyPQ TIL that Hughes engineers swung a satellite around the Moon and approached earth from a 'stealthy' direction, "downwards from the Moon rather than up from the ground, the way we typically think of missile launches by aggressor nations."
l5l1 TIL that sea stars (starfish) are actually top predators feared by everything else in their habitat. Removing them causes widespread effects throughout the ecosystem, just like removing wolves from the forest or lions from the savannah.
rNB84 TIL that the reason we have blue raspberry flavor is because red dye no. 2 (the one traditionally used for raspberry) was considered harmful. The flavor was popularized by ICEE.
vL0L TIL Fake smiling causes real happiness