TEDTalks is an excellent intellectual series highlighting scientists and their research. Their website is http://www.ted.com/
I subscribe to their iTunes feeds and came across a six minute talk by Jim Fallon, a neuroscientist with a fascinating family history.
Where do serial killers come from? Nearly all out students ask us and want to know. Now, the talk is on the website and includes genetic, epigenetic, environmental factors as potential causes. He shows brain scans of people based upon double-blinded research he did. Fascinating and brief. Perfect in our short attention-span world.