For all we know, they may be able to detect te patterns as a resultant form the radio-transmissions. For example, instead of trying to find a wet tennisball in a large room, instead look for the wet marks on the walls where it bounced. It'll tell you the impact, angle of impact, density, and angle of take-off, so you could tell everything about it. They may not be able to pickup the radio waves, but they may be able to discern the impact the waves had, and from that, reconstruct it.
MrGee wrote:I would never eat a person. Have you seen the conditions they're raised in?
kapojinha wrote:You're amazing, which is why I'm going to marry you.
Angua wrote:coordinated baby attacks