How the first visitor to our Solar System may have formed—no alien technology required

By Sid Perkins When ‘Oumuamua swooped into our Solar System in 2017, the object stirred up excitement. The strange shape and trajectory of this first known visitor from interstellar space prompted even some serious scientists to suggest it might be an alien probe. But a new study arrives at a much more mundane explanation. ‘Oumuamua—“scout” or “messenger” in …