In this episode of the Physics World Stories podcast astronomers discuss the search for signs of extraterrestrial technologies. Fingerprints might include traces of pollution in exoplanet atmospheres, lights on the night sides of planets, and even the waste heat from megastructures such as Dyson spheres.

Podcast host Andrew Glester meets the following guests:

Find out more by reading ‘Scanning the cosmos for signs of technology,’ a feature article by science writer David Appell, originally published in the December issue of Physics World.