From Fergus Hawkins, Melbourne, Australia
Dan Falk writes that a reply from extraterrestrials is “possible” within 25 years (25 November 2017, p 12). But what if human civilisation is one of the most advanced in the galaxy? Look at all the technology we have at our fingertips. Any extraterrestrials we encounter are as likely to live in caves as to be superintelligent.
