That and this... Mt Everest is rising due to a collision of rocks under the surface. It's bound to produce some sort of heat. Any one else thing that?
These GPS dudes are cool. One of my buddies got left in a Tower. They forgot about him and drove away. He said "Can you hear me now?" till sundown then climbed down and went home.
GPS appears to still have problems with elevations....from everything I read.