Weird Things in the Sky: Are we alone?
Edmund Gordon, 26 December 2024
There are approximately twenty billion Sun-like stars in the Milky Way. Scientists think that up to a quarter of them are orbited by planets where water could be present; if the same holds true in other galaxies, it would mean fifty sextillion or so planets in the observable universe where intelligent life may have evolved. The chances of Earth being the only one to have realised that...