Why the cheapest drone is the hardest to stop. It looks like something you'd build for a science fair: a modular contraption made of plywood, foam wings, aluminum tubing, and hot glue. But Russia's $500 Molniya drone can carry a 20-pound mine 30+ miles with lethal precision—and they're making 1,000 at a time. It's a deadly guided missile that costs about as much as a mortar round, and the U.S. could struggle to counter it.
For years researchers have tried to unlock the impressive underwater abilities of the diving bell spider, and new study details their best attempt yet.
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