space
Wild New Theory Suggests Radio Bursts Beyond Our Galaxy Are Powering Alien Starships

Since their discovery ten years ago, fast radio bursts have confounded astronomers. These intergalactic pulses of radio energy have defied explanation, but a new theory suggests a technological origin, whereby aliens use these beams to propel their ships through space. Extremely speculative stuff, to be sure, but it’s an idea worth pursuing given just how weird these pulses are. Read More >>

space
The Futuristic Technology That Could Enable Interstellar Travel

Technically savvy scientists and engineers have put much effort into conceiving far-future technologies that might make possible near-light-speed travel. You can learn a lot about their ideas by browsing the web. It will take many centuries for humans to make any of those ideas real, I think. But they do convince me that ultra-advanced civilisations are likely to travel between the stars at a tenth the speed of light or faster. Read More >>