> The Foundry uses this intense interrogation to root out the things that could kill a project down the line, before X has poured in piles of money and time. Take Foghorn, X’s effort to create a carbon-neutral fuel from seawater. The tech was amazing and the problem was huge, but two years in, the team realized they had no viable way to compete with gasoline on cost—and were reliant on technology that was closer to research than development. X killed Foghorn, gave everyone on the team a bonus, and let them find new projects to push.

There's a salt battery project in X. Makani is also in X. There's a thermal pump company that graduated from X last year. There's also a team at Google working on Fusion research. Probably more I don't know too.