Hard Mountain Dew has put a bounty on Bigfoot, turning an impossible challenge into a promotion folks want to participate in. A couple months ago, I wrote about Columbia Sportswear offering to hand over the company to anyone who could prove the Earth is flat by finding its edge. I feel like somebody at Hard Mountain Dew admired the basic idea. The alcoholic Mountain Dew brand has launched its Bigfoot Bounty, inviting Americans 21 and older to submit evidence of Sasquatch through November 30....