What is a specimen?

An Italian astronaut.
Think about it; it may help to say it out loud.
BTW, an Italian guy (my physiology prof) told me this joke.

Ohhh…I get it! It took me ten seconds.

I guess I’m stupid. I said it outloud and still didn’t get it. Am I stupid or what?

Space man.
You not only have to say it aloud, you have to say it like Senor Wences.