The earth has been most interesting place that even those that are dead might possibly be wishing to be back to earth. Why looking for a new house while we are yet to occupy half of its space?.
All the same, research enlighten our knowledge, nice work @illuminatus.
Reading outcome of any further research will be interesting
You should note that we are not the only inhabitants of the Earth. There are millions of species on the planet. Would it be fair if just one species takes half the available space? Would would happen to other species?