标签：时差和气压 相关文章
Have you ever taken a good look at your dog and wondered, where did this creature come from? Sure, you know your dog came from the local shelter or a pet store, but what about before that? If you were able to trace your dog's lineage back to its orig
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Global warming is a real problem, but would you believe that we are actually living in an ice age right now? Yael and Don discuss it. Y: Brrr! Thanks for lunch Don, but it's a little cold to be walking back to the office. D: Well, it is winter. Y: Ac
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If you have a dog, you may have noticed that sometimes it seems to be smiling. But, of course, we know that dogs don't really smile. That's just how dog mouths appear sometimes, right? Perhaps, but according to neuroscientist Jaak Panksepp of Bowling
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Amid the shocking events that occurred on September 11th, one of the most startling was the sight of the collapse of the Twin Towers soon after hijacked planes hit them. In this Moment of Science we explain how and why the collapse occurred. Designed
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ANNCR: Project Head Start On today's Congressional Moment The Head Start program was one of ten federal programs established by Congress in The Economic Opportunity Act of 1964. Project Head Start was originally launched as an eightweek summer experi
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Local newspapers jumped on a story this week on the topic of Chinglish. Chinglish is not a new word. I heard it for the first time 30 years ago. At times Chinglish can be charming. At the wrong moment, however, Chinglish can annoy readers, and embarr
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Mike: Amanda, do you like my new look? I spent all weekend looking for clothes to match my new look and my new attitude. From now on, I'm a rebel without a cause and nobody gets in my way! Amanda: Hahaha... you look like someone who slaughtered a poo
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Amanda: Sorry I'm late, Mike－some slowpoke blocked my way going down the escalator and I just missed the subway train. I hate it when people take their sweet time and don't get out of the way! Arrrgggh!!! Mike: Yeah, I know exactly what you're talk
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On a previous Moment of Science we discussed one of the problems with turning yourself invisible. Sure, it sounds like fun. But a little physics showed us that the invisible man couldn't see anything either, because in order to see, light has to inte
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Last time we imagined a tunnel through the center of the earth. If such a thing existed, you could step into one end, fall all the way to the other side, and step out. Gravity would cause you to pick up almost exactly as much speed on the way down as
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Don: Yael, every day I grow closer to my goal of mind control. Yael: What do you mean, Don? D: Check out this study from Ohio State University that says nodding your head to signal approval and shaking your head to signal disapproval not only lets ot
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Ya?l: Hey Don, what's that? Don: It's a tomato I found! Don't you think it looks like Richard Nixon? I wonder why tomatoes and other fruits sometimes grow into such different shapes. Y: Scientists wonder about that too, and they are a step closer to
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Don: [WHISTLING A BIRDSONG-LIKE TUNE] Ya?l: Nice tune Don, but can you whistle with your tail like an Anna's hummingbird? D: Hummingbirds can whistle with their tails? Y: Male Anna's hummingbirds, which live along the west coast of North America, can
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E cigarettes are battery-powered tubes that look like real cigarettes. But instead of inhaling and getting a lungful of tobacco smoke, you basically suck in vaporized nicotine. According to companies that make e cigarettes, since theres no tobacco sm
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But measuring movement is actually pretty tricky. Any small mistake in the measured acceleration results in position errors that grow with time. So even if youre standing still and just rocking in place, a navigation computer relying solely on the IM
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Did you ever wonder why sugar dissolves in a cup of coffee? Why not have the sugar just float in the middle of the cup, without dissipating into the coffee? Its because of the way water molecules interact with molecules in other substances. A water m
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In 1928, Alexander Fleming was studying the bacterium, Staphylococcus, when some of the bacteria became contaminated with Penicillium fungus and stopped growing. Fleming decided that some chemical produced by the Penicillium fungus must be stopping t
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Probably all, or nearly all, who have experienced a cold winter, are familiar with the cheery cry of the snow as it is pressed against a hard surface by the steel tire of a wagon, for instance, or even onto a pavement by the heels of ones boots. Thos
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Since that time, scientists have found that numerous species of fungi produce chemicals to destroy bacteria and that bacteria even produce chemicals that destroy other bacteria. Antibiotics are relatively new in modern medicine, but the earliest medi
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But measuring movement is actually pretty tricky. Any small mistake in the measured acceleration results in position errors that grow with time. So even if youre standing still and just rocking in place, a navigation computer relying solely on the IM
英语时差8，16