科学60秒:黑匣子为安全降落保驾护航
The little black boxes in airplanes provide useful information after a crash has taken place. Now researchers have___1___a way to use black box info from planes that do not___2___—to help preven
科学60秒:棒球裁判与数学结缘
The traveling salesman problem is a favorite math conundrum: if a salesman has to visit a ____1____ of cities, how do you get him to all of them once via the shortest possible route. But the trav...
自然与环境:亚特兰大燃气紧缺
自然与环境:亚特兰大燃气紧缺It has been a wild gas chase for a lot of people in Atlanta. A pump without a plastic bag on the handle or a “No Gas” sign is hard to come by thanks to supply issues...
社会:最高法院支持注射死刑
社会:最高法院支持注射死刑The Supreme Court has upheld lethal injection as a method of execution. Justices rule 7 to 2 this morning rejecting a constitutional challenge brought by a case in Kentu...