"Mysterious Spacetime Ripples Could Herald Universe's Dawn, Baffling Astronomers"

Astronomers from the NANOGrav collaboration are investigating the origins of faint gravitational waves detected in the Milky Way, which may be from merging supermassive black hole binaries or exotic cosmological processes from the early universe, such as cosmic strings, phase transitions, or domain walls. These findings could provide insights into the universe's infancy and the ongoing search for dark matter and dark energy. The complexity of the signals and the limitations of current detectors like LIGO pose challenges, but upcoming missions like LISA and AEDGE are expected to enhance gravitational wave detection capabilities. The research has been accepted for publication in the journal Physical Review D.