Plus: Palmer Luckey’s new startup plans to genetically enhance military dogs. This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. Some seemingly impossible feats are too good to give up on. Decoding a pet’s yowls and yips? Absolutely. Scrubbing the world of forever chemicals? Yes, please. Rocketing to Mars in a fraction of the time? Sounds great, but how close are we, really?