"We estimated an outflow from the comet's nucleus of about two tons per second, equivalent to approximately 70 Olympic ...

Stephen Smith is a managing editor for CBSNews.com based in New York. A Washington, D.C. native, Steve was previously an editorial producer for the Washington Post, and has also worked in Los Angeles, ...

In most narratives, the story of evolution is the story of organisms emerging from the ocean and eventually populating the land. But for some species that evolution also involved a return trip. Dozens ...

When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that ...