Russia’s Cheap New Drone Is a Threat. Here’s How the U.S. Will Defend Itself.

Given the massive scale of Russian and Chinese strike drone production, the U.S. needs more interceptors in the price range ...

From stellar engines to Dyson bubbles, alien megastructures could hold themselves together under the right conditions

New theoretical models have strengthened the case that immense, energy-harvesting structures orbiting their host stars could ...