A Harvard scientist has ignited speculation, claiming that a comet currently under observation might not be a mere icy rock.

Astronomers have spotted a comet doing something never seen before – slowing its rotation significantly as it makes its way around the Sun. The rest of this article is behind a paywall. Please sign in ...

I/ATLAS isn't 'behind the Sun', explains Dr. Brandenburg. Learn why observers were fooled and how its solar pass tests Avi Loeb's 'alien mothership' theories.