I was reading about WiMAX networks and how they can provide a 30mbit connection to a user 50km away! Now, I don't have a great understanding of data transfer but I assume inverse power law applies?? Pf = Pi / 4*pi*r^2 At 50km Pf = Pi / 10^10 * pi For Pf = 30mbit/sec = 30*10^6 Pi must equal: 30*10^6 * 10^10 * pi = 10^18 bits/sec = 1 EXAbit/sec Really?! Can they transmit an EXAbit of data per second? How the hell do these things work?!