Defense

Is baby Skynet already here? We need robust laws now to withstand eliminating humans from nuclear decision-making

Russia may be planning to put a nuclear weapon in orbit. We have known since the 1960s why that is a bad idea

Autonomous and AI-enabled systems increasingly rely on optical and radio frequency sensors and significant computer power. They face growing vulnerabilities from directed-energy laser and microwave weapons

Puzzling Havana Syndrome injuries that have afflicted U.S. diplomats may have a more complicated explanation than solely pulsed microwaves or mass psychology

Costs are skyrocketing to modernize the U.S. nuclear arsenal. Instead of turning a blind eye, Congress should demand fiscal oversight and make hard decisions balancing costs with deterrence

Melba Phillips co-authored a paper with J. Robert Oppenheimer in 1935 that proved important in the development of nuclear physics. Later she became an outspoken critic of nuclear weapons

Rotating detonation engines developed by NASA and others could spark a rocketry revolution

Sean Kirkpatrick looked into the skies and deep into government archives for extraterrestrials. What he found is, to him, more concerning than little green men.

Sallie Pero Mead made major discoveries about how electromagnetic waves propagate that allowed objects to be detected at a distance

A forthcoming investigational report from an office of the Pentagon has found no evidence of aliens, only allegations circulated repeatedly by UFO claim advocates

Worried Pentagon officials are resetting U.S. Arctic policy and training in response to China and Russia’s plans

Emma Unson Rotor worked on the proximity fuze, a groundbreaking piece of World War II weapons technology that the U.S. War Department called “second only to the atomic bomb.”