Now, building on a tradition of ground-based simulation that extends back to 1958, a new series of experiments, conducted by an interdisciplinary research team from the Faculty of Natural Sciences of the University of Aarhus, Denmark, suggests that indeed bacteria could survive beneath the martian soil.
Why I Hope There's No Life on Mars
Why am I such a spoilsport? Because life on Mars would make life on Earth a lot more complicated. First, imagine that there’s no life on Mars. That means we can go there, as we did on lunar missions, with no serious worries about bringing back deadly germs. (We initially quarantined Apollo astronauts upon their return to Earth. But by Apollo 15 NASA had concluded that the moon was as lifeless as, well, the moon.) No concerns about bringing deadly bacteria home, and none about contaminating the moon with earthly bacteria that might mess up its biospheric ecology.
(Both items sighted at The Keyhoe Report.)