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Named for ErwinSchrdinger, the quantum physicist who created the theory,Schrdinger's Cat is a thought experiment where (theoretically) a cat is placed inside a box along with poison and some radioactive material. If any of the radiation decays, this triggers the poison, killing the cat. But if the material doesn't do anything, the cat, as unseen by the observer, is in a state of both life and death (via Discover Magazine).

When u/Aggressive-Nobody473 asked other "Big Bang Theory" fans about what they learned from the show, several commenters mentioned Schrdinger's Cat as a favorite. The theory is first explained in Season 1, Episode 17 ("The Tangerine Factor") as Sheldon uses it to explain the possibilities for Leonard and Penny's blossoming relationship.

In one comment,u/FruitySwiftA113 wrote, "I use it in every day [sic] conversation and comparisons now." Other Reddit users appreciated the real-life science reference, but also ultimately remained reticent to use it in everyday life. For example,u/Rosemoorstreetshared that theyloved it, but wrote, "the science is so far over my head that there is no hope for me to learn any of that!" Still, the concept is so compelling that it is hard not to think over it, even if one part sounds particularly creepy.

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The Big Bang Theory Fans Actually Walked Away With This Cool Piece Of Knowledge - Looper