Is There a Milky-Way Galaxy/Earth Biodiversity Link?

dailygalaxy.com — in 1999, Astronomers focusing on a star at the center of the Milky Way, measured precisely how long it takes the sun to complete one orbit (a galactic year) of our home galaxy: 226 million years. The last time the sun was at that exact spot of its galactic orbit, dinosaurs ruled the world. May 17, 2009 View in Crawl 4