Scientists discovered a galactic ghost — but there’s nothing paranormal about it
Its a classic Halloween tale. A group of ghost hunters visit a grand old house that is rumoured to be haunted. But after thoroughly exploring, they leave disappointed: there are no ghosts to be seen. It was there all the time. The finding has huge significance because it demonstrates how chemical elements mix on very large scales around galaxies. Baryonic matter is normal everyday matter, such as carbon. So were intimately connected to the stuff....