How cosmologists finally found the missing half of our universe s matter

Get the Full StoryIn the late 1990s, cosmologists made a prediction about how much ordinary matter there should be in the universe. About 5 , they estimated, should be regular stuff with the rest a mixture of dark matter and dark energy. But when cosmologists counted up everything they could see or measure at the time, they came up short. By a lot. The sum of all the ordinary matter that cosmologists measured only added up to about half of the 5 what was supposed to be in the universe. This is known as the missing baryon problem and for over 20 years, cosmologists This story continues at The Next Web