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There is a legally permissable organic contamination amount in any food, especially if it's processed. Bugs, hair, nail clippings, dirt, mouse shit, whatever - all ground up and processed asking with the product. And it can be in almost anything, including that one you really like.
Combinatorics scares me, the immense size of seemingly trivial things.
For example: If you take a simple 52 card poker deck, shuffle it well, some combination of 4-5 riffles and 4-5 cuts, it is basically 100% certain that the order of all the cards has never been seen before and will never been seen again unless you intentionally order them like that.
52 factorial is an unimaginable number, the amount of unique combinations is so immense it really freaks me out. And all from a simple deck of playing cards.
Chess is another example. Assuming you aren't deliberately trying to copy a specific game, and assuming the game goes longer than around a dozen moves, you will never play the same game ever again, and nobody else for the rest of our civilization ever will either. The amount of possible unique chess games with 40 moves is far far larger than the number of stars in the entire observable universe.
You could play 100 complete chess games with around 40 moves every single second for the rest of your life and you would never replay a game and no other people on earth would ever replay any of your games, they all would be unique.
One last freaky one: There are different sizes of infinity, like literally, there are entire categories of infinities that are larger than other ones.
I won't get into the math here, you can find lots of great vids online explaining it. But here is the freaky fact: There are infinitely more numbers between 1 and 2 than the entire infinite set of natural numbers 1, 2, 3...
In fact, there are infinitely more numbers between any fraction of natural numbers, than the entire infinite natural numbers, no matter how small you make the fraction...
In one of Vsauce's videos he suggested a good visualisation of the number of unique shuffles of a deck of cards that was originally suggested by Scott Czepiel.
Imagine you have a friend that is shuffling a deck of cards and ordering the deck uniquely every second. Also imagine that every action you take is completed instantaneously.
You stand on the equator. Wait a billion years. Then take a step. Wait another billion years. Then take another step. Continue this until you have got back to where you started.
Then take 0.02ml from the Pacific Ocean. Wait another billion years. Then take a step. Continue until you get back to where you started and take another drop out of the Pacific Ocean.
Repeat this process until the entire Pacific Ocean is empty. Then place a sheet of paper on the ground at sea level.
Refill the ocean and repeat - wait a billion years between steps as you walk around the equator, take a drop of water out of the Pacific Ocean every time you get back to where you started and place a piece of paper on the ground in a tower before refilling the Pacific Ocean and repeating.
When the tower of paper reaches the sun do you think that your friend has managed to produce each, unique ordering of the cards?
Nope! Not even close...
If you were to repeat all of the above 3000 times, then he'd be pretty much done.
There are about the same number of bacteria cells in your body as human cells, and some of the bacteria in your intestines, 'gut biome', can affect your preferences for certain foods effectively controlling your mind.
A 'reference man' (one who is 70 kilograms, 20β30 years old and 1.7 metres tall) contains on average about 30 trillion human cells and 39 trillion bacteria,
https://www.nature.com/articles/nature.2016.19136
Is eating behavior manipulated by the gastrointestinal microbiota? Evolutionary pressures and potential mechanisms:
https://onlinelibrary.wiley.com/doi/full/10.1002/bies.201400071