nationalgeographic.comNational Geographic Magazine️@NatGeoSubscribe to National GeographicWhy are people so dang obsessed with Mars?How viruses shape our worldThe era of greyhound racing in the U.S. is coming to an endSee how people have imagined life on Mars through historySee how NASA’s new Mars rover will explore the red planetWhy are people so dang obsessed with Mars?How viruses shape our worldThe era of greyhound racing in the U.S. is coming to an endSee how people have imagined life on Mars through historySee how NASA’s new Mars rover will explore the red planetWhy are people so dang obsessed with Mars?How viruses shape our worldThe era of greyhound racing in the U.S. is coming to an endSee how people have imagined life on Mars through historySee how NASA’s new Mars rover will explore the red planet