The mysterious 28 mile rock approaching the sun at a speed making it the fast object in the solar system is also emitting a lock of CO2- an anomolously high 8 to 1 ratio of CO2 to H2O. That hasn't been observed before in comets. As it reaches it closest point to the sun in October it will also be invisible to the Earth on the far side as it will be just in a line on the other side of the star.
Though the object is not a danger to the Earth as its trajectory is nowhere close to one that would crash into the Earth, some have speculated that it could be some kind of vehicle for extra-terrestrials since it exhibits characteristics very uncommon for one of the more familiar kind of visitors to the inner solar system. 3I/ATLAS's origin and composition is so far unknown.
https://avi-loeb.medium.com/the-first-webb-telescope-observations-of-3i-atlas-8cd89e872870
A Harvard physicist has suggested the object could be nuclear powered, yet it seems to be more of a hyper-fossil fuel carbon super-Toronado with the copious gas it exhausts.
