Schrodinger's cat
So what does quantum physics have to do with sasquatch? In the case of this thought experiment, perhaps quite a bit.
First a little info for those who aren't familiar with quantum physics, or who has never watched that Big Bang Theory episode. [Or a later one where Penny is explaining it to one of her "dimmer" dates].
The Austrian physicist Erwin Schrodinger devised a hypothesis as follows : A cat is put in a box along with a vial containing cyanide along with a mechanism designed to open that vial at some time in the unknown future. The actual time this will happen cannot be calculated. At some point in time the cyanide gas will be released and the cat will die.
Before anyone gets upset, this was presented as a HYPOTHESIS -- a THOUGHT experiment. It was never actually done. A "what if" exercise.