This video will make you hungry and possibly nostalgic

More like this

There are many versions of Linux, but the two biggies seem to be Debian (on which Ubuntu and many other distributions are based) and Red Hat. Red Hat uses a commercial support model, so it is an example of a very different approach than Ubuntu.
I had promised a little more info on Scientific Linux. This is a form of Linux with a name that changes faster than my shirt when I realize I've got it on inside out. Form the Fermi LInux site:

That would have made me hungry, if only I was ignorant of the fact that nobody does a proper rubber band al dente.

That does make me nostalgic... for the old days when I had that much free time - although this certainly puts my squishing/exploding Gumby animations to shame :)

I just loved the squishing of the pincushions. I'm sure it has nothing to do with a proclivity for squishing things :)

Nicely done!