The Download: testing six tech promises and biotech's blind spots

The Download: testing six tech promises and biotech's blind spots Plus: Palmer Luckey's new startup plans to genetically enhance military dogs. Some seemingly impossible feats are too good to give up on. Sounds great, but how close are we, really? In the new Impossible issue of, we ran progress reports on six potentially transformative technologies and ideas that have been "just around the corner" for years, or even decades. From exercise in a pill to nuclear-powered spaceships, we asked experts what's holding them back and how far they've come. Check out our stories on how they all stacked up .