Winners losers or grails

How we chose our winners, losers, and Holy Grails. We picked six categories of technology - electric power, biotechnology, and so on. Then, within each of these categories, we picked a specific project that looked like a winner, one that looked like a loser, and a Holy Grail - a long-standing quest that could fundamentally change something about our lives. We favored bold, risky projects with a sizable potential payoff.