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TIL that Jim Carrey explained the significance of detecting gravity waves in the cosmic microwave background 10+ years ago (Conan O'Brien Show, 22 May 2003). Special guest star Stephen Hawking.

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a8YdZ TIL that Bismuth, the active ingredient in Pepto-Bismol, technically has no stable isotopes - however its most stable and common isotope has a half-life more than a billion times the age of the universe. (Some more facts in the comments)
GYQN7 TIL Tom Brady’s body guards were convicted of attempted murder trying to retrieve pics from the paparazzi
e07oJ TIL - You can skip piracy warnings and trailers on a DVD by pressing STOP -> STOP -> PLAY
Yp0AB TIL that there was an experiment to teach dolphins English. A dolphin called Peter did actually learn a few words but actually fell in love with his teacher and also had sexual urges. Consequently, the experiment ended pronto but unfortunately the dolphin couldn’t cope and committed suicide.
Oln6 TIL Seth MacFarlane was an animator and writer for Johnny Bravo, Cow and Chicken, Dexter’s Laboratory, and I Am Weasel before starting Family Guy.