Has this magnetic field been decaying at the same rate since the creation of the earth, possibly not, although an extremely low rate would have to have occurred to provided for the millions of years of evolution under a survivable magnetic field. There is no way that the magnetic field could not have existed. The instant the magnetic field ceased to exist, the entire plant would be scorched by the atomic radiation emitted by the sun. This evidence gives an indication that the earth may actually be a rather young planet, with an ago of a few thousand years instead of several million. There a large compiling of evidence by many extreme creation groups that seem to have a more fanatical approach to the evidence.
Many times there are scientific claims without scientific evidence to support their claims.
I often ask myself if it is really necessary to posses true scientific evidence of God s creation. I would speculate that many people would deem the find as a hoax. The true remains that no matter what overwhelming evidence there is to support any particular claim there will always be someone who sees things just a little bit differently. Most scientific findings are based on facts and theories that have been produced through assumptions of what we know. Little faith is needed to accept what is found as fact in the scientific community.