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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? As a bitter winter storm rages on the east coast, it's hard to knock being warm-blooded. But what about the metabolic cost of maintaining a high body-temperature? Well,
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Changing Arctic Conditions Threaten Polar Bears 北极环境变化威胁北极熊生存空间 American researchers spent two summers studying polar bears on the Arctic sea ice. They found that sea ice, where polar bears spend much of their lives, is
2015年VOA慢速英语(八)月
Heart Rate: What A Babys Heart Rate Should Be 婴儿的心率应该为多少呢？ Picture new parents cooing at their baby on the couch. The babys quiet and calm, and everyones at rest. So their heart rates are low, maybe 60 or 70 beats a minute for
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Scientists, like mothers, have long suspected that midnight snacking is inadvisable. But until a few years ago, there was little in the way of science behind those suspicions. Now, a new study shows that mice prevented from eating at all hours avoide
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