My editor at Geographic 我地理学的编辑 wanted me to find America's Blue Zone. 想让我找个美国的蓝区。 And for a while we looked on the prairies of Minnesota, 一时间我们观察了明尼苏达草原， where actually there is a very high propo

Weekly Address: Merry Christmas from the President and First Lady (December 25, 2015) 奥巴马每周电视讲话：总统祝福全国人民圣诞节快乐 THE PRESIDENT: Merry Christmas, everybody! This is one of our favorite times of the year i

Why this is interesting is because in the past decade we have found that this is not just some anomaly of this ridiculous, 这个发现之所以有趣，是因为在过去十年间，我们发现这种现象不只局限在这种古怪的、 glow-in-the-dark bacterium that lives

With doctors facing deep cuts in their reimbursements from Medicare unless Congress acts to correct long-standing problems, the President calls on Senate Republicans to stop blocking the remedy and pl

My job is to design, build and study robots that communicate with people. But this story doesn't start with robotics at all, it starts with animation. When I first saw Pixar's "Luxo Jr.," I