I heard the Texas one from the dubs.
Basically, there was some secular statement like this in the 70s or 80s and the dubs co-opted (read: misconstrued) it to "prove" resurrection to Earth would be totally plausible.
This was accompanied by a small movement at the time to "green the desert". The belief was that you could pump water into the desert, plant trees, and soon it would no longer be the desert. Claims were made that the desert was so fertile that crops could grow overnight. This was one of many magic tricks jehoopla would perform after we were done burying the bodies of all the dead non-jws.