From the cold, lightless outer reaches of a distant star system, an ancient traveler arrived carrying chemical memories of its frigid birth. The interstellar comet 3I/ATLAS, the third confirmed visitor from beyond our solar system, has revealed through its unusual abundance of methanol that it formed far from any warming stellar radiation — a frozen record of planetary formation in a system we will never visit. Its passage through our cosmic neighborhood is both a scientific gift and a reminder that the universe is not a collection of isolated worlds, but a vast, interconnected expanse where m