Antarctica.

Biology Within this past few days, after sixteen years of planning, scientists have begun drilling two miles into the ices of Antarctica searching for life:

"The most likely organisms to be found will be bacterial - - they’re everywhere,” David Pearce, a microbiologist at the program said in an interview in October, shortly before heading to the southern continent to begin preparations. “If there’s nothing there, that will tell us the limits for the existence of life on Earth.”