朝鲜核武会谈有望重开(1)

科学60秒:山高万丈，实为错觉

Stand at the bottom of a big hill and you can exhaust yourself just thinking about climbing it. But a new study suggests it’s not as bad as it looks. Because people tend to ____1____ the steepne...

科学60秒:医生昏昏欲睡 手术患者担责

Over the years ____1____ limit the hours of hospital interns and residents. Because someone putting in a 100-hour workweek might not be at their best when deciding which medication to prescribe o...

科学60秒:"以身犯险"诈骗术

Toss a piece of leaf onto a spiderweb. The spider is indifferent. Because leaves don't squirm like captured flies. But Australia's "assassin bug" _1_ spiders. It exploits their keen sense for vib...

深入研究功能性饮料(1)

tips: Chad Reissig Johns Hopkins University Baltimore Maryland taurine guarana inositolYou could fill a store with all the energy drinks now available. They promise to make people feel more ene...