危險實驗:把氣球放進微波爐里的后果
Stop! The following experiment is dangerous. For your safety and the protection of 1_______, do not try this at home. No, really, don't. This is a balloon, but not just any balloon. It's filled
科學60秒:別把吃土的當怪人...
There’s a ___1___ that’s had scientists puzzled: the practice of geophagy—eating dirt. People around the world ___2___, and not just when they’re hungry enough to eat anything. So is there an...
科學60秒:土星環(huán)——衛(wèi)星的殘跡
Galileo first ______1_____ Saturn’s rings 400 years ago. But since then, scientists have ______2_____ how they got there. Because the rings are almost pure water ice—and material in the outer s...
科學60秒:白鯊年幼 未必兇猛
They’re everyone’s worst nightmare when it comes to swimming in the ocean: great white sharks. That’s despite the fact that the number of fatal shark attacks annually can usually ____1____. Bu...