http://www.newsweek.com/what-sun-made-more-metal-hydrogen-helium-1710495 > Astronomers have found that the sun is more metallic than we previously thought, potentially solving an astronomical mystery that scientists have grappled with for years. > The sun is Earth's closest star and the source of all life on Earth. Without it, plants couldn't photosynthesize and oxygen abundance would plummet. We'd also bump into things a lot more.