See a recreation of the experiment that discovered the electron

Check out this awesome experiment that shows how J J Thomson began proving the existence of the electron. Thomson did this in 1897, despite the notable difficulty of electrons being much, much too small to see. (Sadly, that's still true today. And we say we've made progress.) We'll tell you how this simple… » 12/28/12 7:00am 12/28/12 7:00am