An absurd conspiracy embraced by a GOP congresswoman would be funny if she wasn't serious and if people knew more about how lasers and space solar really work.

The massive structure designed to capture the energy of an entire star envisioned by Freeman Dyson is popular in science fiction. But can we build it? And have alien civilizations tried a similar idea?

Would aliens actually want to build a Dyson Sphere? It wouldn't be out of reach for them, but they might get a lot less power out of it, with a lot less utility than it seems at first glance...

Space-based solar arrays promise to harness the raw power of the sun without atmospheric diffusion. But how do we get that power down from orbit?