AI Is Here to Replace Nuclear Treaties. The last major nuclear arms treaty between the US and Russia just expired. Some experts believe a combination of satellite surveillance, AI, and human reviewers can take its place. For half a century, the world's nuclear powers relied on an intricate and complex series of treaties that slowly and steadily reduced the number of nuclear weapons on the planet. Those treaties are gone now, and it doesn't appear that they'll be coming back anytime soon.

This Startup Thinks It Can Make Rocket Fuel From Water. General Galactic, cofounded by a former SpaceX engineer, plans to test its water-based propellant this fall. If successful, it could help usher in a new era of space travel. There's been this hand-wave, this assumption, this at the core of our long-term space programs. If we can return astronauts to the moon, we'll find ice there.