Two scientist did an experiment:
Their frog could jump 10 feet. They cut off 1 front leg and the frog jumped 8 feet. After removing the other front leg, it jumped 6 feet. Removing 1 of the back legs resulted in only a 2 foot jump. They removed the last leg and the frog didn't jump at all, no matter how loud they yelled or stamped their feet on the floor.
Their conclusion?
When you cut off all of a frog's legs, he goes deaf.

"...squaaaaaared away."

I have a clipping of this cartoon in a box somewhere. One of my all-time favorite Farsides. 

Yep

My favorite far side though is one where there is a ship with phones underwater listening to the songs of humpback whales and this one whale swims up underneath the ship and starts singing "Louie Louie"

Can't find a link to another favorite: Captioned something like "Nuclear Physicist Practical Jokes", where the one scientist is about to burst a paper sack behind the head of another. 

Oh yeah while he is working on the serious end of the missile?  I love that one too.