Article snippet: A small discrepancy in the value of a long-sought number has fostered a debate about just how well we know the cosmos. By DENNIS OVERBYE The illustrations of Santiago Ramón y Cajal, the father of modern neuroscience, are featured in the new book “The Beautiful Brain.” By JOANNA KLEIN Researchers tried to pin down why our brains can be susceptible to errors in perception that make us mix up mouth movements and sounds. By JOANNA KLEIN The rocket lifted off from a launchpad used for the Apollo moon missions. It was the first launch from Kennedy Space Center in more than five years. By KENNETH CHANG An ecological cornerstone is vanishing rapidly from the oceans, and scientists fear the consequences for climate change, fisheries and disease. By CARL ZIMMER Some researchers think turtles evolved the ability to retract and then stretch their necks to snatch prey, not defend themselves in their shells. By NICHOLAS ST. FLEUR A teenager’s fossil hunt two decades ago may have cha... Link to the full article to read more