Comet 3I/ATLAS bigger than asteroid that killed a dinosaur 66 million years ago? Harvard scientist's bizarre claim

Interstellar comet 3I/ATLAS has sparked curiosity among scientists as the space object changing its behaviour. Harvard scientist Avi Loeb has suggested that 3I/ATLAS is not a comet as the object's size offers another hint that it might not be a comet. He said that the comet 3I/ATLAS is bigger than asteroid that killed a dinosaur 66 million years ago.