We keep looking for space aliens. Are they looking for us?
An intelligent species of extraterrestrials might have telescopes far more powerful than ours.
Sept. 18, 2019, 9:33 AM EDT
By Seth Shostak
Scientists have been trying to discover planets around other stars for generations. They finally succeeded in the 1990s, and more than 4,000 have been catalogued since then.
But could aliens have found our planet? Is Earth cataloged by even a single population of extraterrestrials? If so, what do they really know about terra firma?
Seeing you there