SETI to Scour the Moon for Alien Footprints?

SETI to Scour the Moon for Alien Footprints? "The most profound question asked by mankind is: are we alone? So the second most profound question must be: where should we look if we're not alone?

Now, two prominent scientists have published a paper suggesting that although we have an entire universe to seek out the proverbial alien needle in a haystack, perhaps looking in our own backyard would be a good place to start."