Sperm: 15 crazy things you should know
October 7th 2011 08:02
Sperm Are Tiny
Want to see a sperm cell? Better have a microscope, because sperm are far too tiny to see with the naked eye. How tiny? Each one measures about 0.002 inch from head to tail, or about 50 micrometers.
Of course, what sperm lack in size they more than make up in sheer numbers. If a guy could coax all the sperm in one ejaculate to line up end to end, they'd stretch six miles.
That's a lot of sperm.
Credit: istockphoto
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