The "Did You Know?" Thread...

Have an interesting factoid that most people might not know about?

Please post it here and include any link(s) to supporting evidence.

Any topic is game!

I'll start...

#1: Did you know that cows don't produce milk unless they've recently given birth?

I'm embarrassed to admit that I did not know this until I was in my 40's. Turns out my ignorance isn't unusual.

... in order to maintain uninterrupted...

Read more

from The "Did You Know?" Thread...