"President Barack Obama presents former United States Marine Corps pilot, astronaut and United States Senator John Glenn with a Medal of Freedom, Tuesday, May 29, 2012, during a ceremony at the White House in Washington."
Light Years strives to tell the stories of science research, discovery, space and education. This is your go-to place on CNN.com for today’s stories, but also for a scientific perspective on the news and everyday wonders. Come indulge your curiosity in all things space and science related, brought to you by the entire CNN family.
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