Did you know?

[Rachael]

I thought one of these threads would be cool. I don't think there is one, tell me otherwise if there is. Sometimes I find out random things that are quite interesting. Mine are usually biology-type facts but any science or technology related facts are welcome.

Did you know... the pH of semen is 7.2 to 8?
Did you know... the pH of the vagina is 3.8 to 4.5?
Did you know... the process of making sperm is called spermatogensis, and takes 56-63 days to complete?
Did you know... oogensis is the process of making eggs?

Only 4 for now.

[The Girl From Ipanema]

I knew the last two but not the first two.