A new tech start-up is promising drones with infinite endurance using laser power. It's not the first time I've heard of such a scheme, indeed the article mentions a better-known instance when the company in question actually won a prize from NASA for powering a proof-of-concept space elevator prototype. I can't help but wonder how they plan on solving the "over-the-horizon" problem though. Lasers don't exactly bend with the curvature of the Earth, ya know?