In America, people are faced with more and more decisions every day, whether it’s picking one of thirty-one ice cream flavors, or deciding whether and when to get married. That sounds like a great t
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Scoop That Poop 我好“无辜”的Actually, dog poop turns out to have a pretty big environmental impact. If you think that two in five households in the U.S. have at least one dog and that abou
The Biggest Magnet 最大的磁体A: What’s the biggest magnet ever?究竟什么是最大的磁体?B: Well, that’s a great question. Well, for starters you’d have to mention whoppers like the
Salt vs. Ice 食盐大战冰块Y: Why does salt melt ice?为什么食盐能让冰块融化?D: It lowers the melting and freezing point of water.是因为食盐将水的熔点和冰点降低了。Y: Oh
Why do Stradivarius violins sound so good? 为什么史特拉第瓦里小提琴声音那么美妙?A: What did I tell you?我告诉过你什么来着?B: You’re right Yaoyao.This is a beautiful piece.
Afterglow 夕照，晚霞Here’s an experiment you can try: look at something bright relative to its surroundings, such as a lamp or a sunny window, for ten seconds without blinking. Then shut your e
Do hand sanitizers work any better than soapand water? 洗手液比肥皂水好用吗?Yaël: We re-enjoy our hero, the handsome Donne, in the kitchen where he’s preparing baked Alaska for his lo
Overfishing Whales and the Environment 过度捕鲸与环境Until recently, when scientists studied changes in open-ocean ecosystems, they looked at changes in the bottom of the food chain that gradua
Congress first dealt with issues of safety and health in the workplace in 1890, when legislation was passed for safety standards in coal mines. Over the next several decades, more complicated machiner