The UFO whistleblower and the search for extraterrestrial life
16 min
Aliens, science and speculation in the wake of 'Oumuamua. The question of extraterrestrial life is one of the great unknowns. Matthew Bothwell — a public astronomer at the University of Cambridge — reflects on what the recent discovery of a piece of flying cosmic debris says about how space-faring science works when data is scarce: is ʻOumuamua an alien-made artefact or just interstellar rubble?