I spent much of today reading about electromagnetic radiation.  Imagine those rays bouncing through and around us all. 

Some of those rays are visible, so we can see colors.  Some are x-rays and gamma rays.  And some frequencies are allocated by the FCC.

Yesterday's Harold Feld post is a doozy -- all about a spectrum giveaway being sought from the FCC in the name of public safety.  Lots of details here.