Dyson Spheres, Alcubierre Drives, & Anti-Gravity Chewing Gum

How actually thinking about something for a moment can reveal its utter implausibility.

Image credit: Space.com

As many people get most of their information from a screen, it’s not surprising that a lot of folk are seduced by ideas that seem plausible (because we’ve seen them on a TV show or in a movie) yet are to all intents and purposes totally impossible. While we’d all like to…