Cosmic Microwave Background Reveals Flat Universe, Leaves Infinity Question Open

Recent observations of the cosmic microwave background (CMB) indicate that the universe is remarkably flat. However, flatness alone does not confirm an infinite cosmos. The data suggest that the observable universe could represent only a small patch of a much larger, possibly curved, space. Moreover, space could be flat while still wrapping around itself in exotic topologies, meaning that the universe might be finite yet unbounded. These findings highlight the limits of current measurements and underscore the need for further studies to determine the true global shape and extent of the cosmos.