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Why is this though? What’s the science for making old eggs float?
The older an egg gets the more experienced it gets with swimming. I once had an egg that was so old, it could do 4 laps in an Olympic swimming pool in under a minute
Unfortunately by that zime it had already gone bad. Started smoking, got into trouble with the law, that sorta stuff. Must be because of that satanic heavy metal music
The egg start to decompose and produces gas. Some of that gas escapes through the shell, so the egg's mass decreases, which causes the density of the egg vs water to drop.
As an egg gets older it starts to break down, so it's density becomes less. Eventually it's density will be less than the water so it'll begin to float.