单词:intagli
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This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Engineers are always plugging away to get better energy efficiency out of our products -- like cars that guzzle less gas or light bulbs that burn brighter on f
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Open your laptop in New York city, and chances are you'll find a Wi-Fi hotspot to surf on. Not so in tiny Lone Pine California, wedged between Death Valley and
This is Scientific American's Sixty-Second Science. I'm Christopher Intagliata. Got the minute? A couple million years ago, mammoths migrated north from Africa to colonize Eurasia. Sometime around then a massive ice age kicked inand it was stay warm
This is Scientific Americans 60-Second Science. Im Christopher Intagliata. Got a minute? One way advertisers convince us to buy something is to remind us that weve enjoyed their product before. But unfortunately, we can have fond memories of a produc
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? When your stomach's empty, it pumps out the hormone ghrelin, to whet your appetite and get your juices flowing. But ghrelin doesn't just make you crave a bite.
This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? During the 2008 presidential election, the Internet became a giant rumor mill. For example, there were the viral e-mails claiming Barack Obama's birth certific