A thread for exceptional facts

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The barnacle has the longest penis, relative to the size of its body.
 
Fresh water ostracods have the longest spermatozoa, relative to the size of its body, some have sperms that are more than 10 times their body length.
 
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On average, it takes viruses and bacteria 12 femtoseconds (1 quadrillionth of a second or) to contaminate food that has been dropped to the floor. So much for the "3 second rule" or "5 second rule" or "whatever number of seconds rule".

Prove it.
 
Graham's number is an unimaginably large number that is a proven upper bound to the solution of a certain problem in Ramsey theory. It is so large that the observable universe is far too small to contain an ordinary digital representation of Graham's number, assuming that each digit occupies one Planck volume, possibly the smallest measurable space. Even the form a^b^c... is insufficient for this purpose; however, the last 12 digits are: 262464195387.
 
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