broadcast fm

I need to know why an FM broadcast can't travel too far (from one side of the earth to other) like an AM broadcast that could travel thousands of miles after getting reflected from the ionosphere. Why can't FM signals be sent to the ionosphere for high range broadcast?

I already have a Realistic (RS) Pro 2006, which does get the FM Broadcast band... ANY OTHER scanner makes / models that also get the FM B'cast band..? Thanks...

I'm brand new to radio, software defined or otherwise, so forgive me if this is a particularly stupid question. While listening with my RTL-SDR dongles, one E4000-based and the other an R820T, I can hear broadcast FM on 31.1. The station I hear on that frequency is 106.7, and both dongles pick...