Explore the five most abundant elements in the galaxy: hydrogen, helium, oxygen, carbon and nitrogen. The remaining seven dozen elements are almost a seasoning. Together they make up just 4% of the universe. And then there’s the unknown, like dark matter. There’s six times more of it than all of the 92 natural elements combined, but what has nature fashioned out of that?
Strange Universe 11/22/20
Photo Courtesy of Pixabay
