Well, easy may be a kind word for it, but watch this video of Dr. Neil deGrasse Tyson explaining what these two things are and how important they are. If you’ve ever seen Dr. Tyson on NOVA scienceNOW, you know that his brain is awesome! Also, follow Dr. Neil deGrasse Tyson on Twitter – he is a smart, mophos.
Tear it up, Doc:
Thanks, Geeks are Sexy!