Is the rest of the cosmos a pristine environment awaiting the arrival of humanity’s “post-human” descendants? Or is advanced life there already – and if so has it visited us? These questions rate as some of the most fascinating in science.
They bring to mind the theme of science-fiction classics like Steven Spielberg’s ET. Now, though, amid the fanfare surrounding his new film, Departure Day, Spielberg himself has said he believes that aliens exist.
So do I, though I’m sceptical of Spielberg’s belief that we’ve been visited here on Earth. Proclamations of UFO sightings, abductions, and so forth never seem convincing.
