朝鲜核武会谈有望重开(1)

科学60秒:加点水,更黏稠？！

Usually, we trust ___1___ to solve problems. Is a runny mixture too thick? Add some fluid. That’ll make it runnier. Except when the fluid makes it thicker. Scientists now think they know why. Th...

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:年老易摔倒怎么办？

The elderly suffer from ___1___. A third of people over 65 fall at least once a year. Half of those fall more frequently. Exercise can help, especially when they exercise to this . That’s right,...

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...