动物奇葩睡眠习惯：海獭睡觉手牵手
<p><span word="From">From</span> <span word="sleeping">sleeping</span> <span word="standing">standing</span> <span word="up">up</span> <span word="to">to</span> <span word="shutting">shutting</span> <span word="down">down</span> <span word="half">half</span> <span word="of">of</span> <span word="their">their</span> <span word="brain">brain</span>, <span word="animals">animals</span> <span word="have">have</span> <span word="some">some</span> <span word="strange">strange</span> <span word="sleeping">sleeping</span> <span word="habits">habits</span>.</p><p>动物们有一些奇特的睡觉习惯，有的站着睡觉，有的一半大脑休息。</p><p><span word="Now">Now</span> <span word="some">some</span> <span word="of">of</span> <span word="these">these</span> <span word="more">more</span> <span word="unusual">unusual</span> <span word="habits">habits</span>, <span word="from">from</span> <span word="napping">napping</span> <span word="giraffes">giraffes</span> <span word="to">to</span> <span word="birds">birds</span> <span word="that">that</span> <span word="sleep">sleep</span> <span word="while">while</span> <span word="flying">flying</span>, <span word="have">have</span> <span word="been">been</span> <span word="revealed">revealed</span> <span word="in">in</span> <span word="an">an</span> <span word="infographic">infographic</span>.</p><p>现在一些更不寻常的睡觉习惯已经用信息图表展示出来了，从打瞌睡的长颈鹿到边飞边睡的鸟类都有记录。</p><p><span word="The">The</span> <span word="chart">chart</span> <span word="maps">maps</span> <span word="the">the</span> <span word="liveliest">liveliest</span> <span word="to">to</span> <span word="the">the</span> <span word="idlest">idlest</span> <span word="creatures">creatures</span> <span word="to">to</span> <span word="reveal">reveal</span> <span word="that">that</span> <span word="Little">Little</span> <span word="brown">brown</span> <span word="bats">bats</span> <span word="are">are</span> <span word="most">most</span> <span word="lethargic">lethargic</span>, <span word="sleeping">sleeping</span> <span word="for">for</span> <span word="around">around</span> 19.5 <span word="hours">hours</span> <span word="a">a</span> <span word="day">day</span>.</p><p>图表展示了从最活泼的动物到最懒惰的动物，其中小型棕蝙蝠是最嗜睡的，一天大概睡19.5小时。</p><p><span word="This">This</span> <span word="long">long</span> <span word="period">period</span> <span word="of">of</span> <span word="sleep">sleep</span> <span word="is">is</span> <span word="thought">thought</span> <span word="to">to</span> <span word="be">be</span> <span word="a">a</span> <span word="way">way</span> <span word="of">of</span> <span word="conserving">conserving</span> <span word="energy">energy</span> <span word="and">and</span> <span word="means">means</span> <span word="they">they</span> <span word="only">only</span> <span word="hunt">hunt</span> <span word="for">for</span> <span word="a">a</span> <span word="few">few</span> <span word="hours">hours</span> <span word="each">each</span> <span word="night">night</span> <span word="when">when</span> <span word="their">their</span> <span word="insect">insect</span> <span word="prey">prey</span> <span word="are">are</span> <span word="available">available</span>.</p><p>这样长时间的睡眠被认为能够保存能量，这意味着每天晚上它们只有几个小时在捕捉昆虫。</p><p><span word="In">In</span> <span word="contrast">contrast</span>, <span word="giraffes">giraffes</span> <span word="can">can</span> <span word="go">go</span> <span word="weeks">weeks</span> <span word="without">without</span> <span word="sleep">sleep</span> <span word="and">and</span> <span word="when">when</span> <span word="they">they</span> <span word="do">do</span> <span word="grab">grab</span> <span word="some">some</span> <span word="shut">shut</span> <span word="eye">eye</span>, <span word="it">it</span>’<span word="s">s</span> <span word="never">never</span> <span word="for">for</span> <span word="more">more</span> <span word="than">than</span> <span word="five">five</span> <span word="minutes">minutes</span>.</p><p>相比之下，长颈鹿可以几个星期不睡觉，它们真正闭上眼睛的时间也不会超过5分钟。</p><p><span word="This">This</span> <span word="is">is</span> <span word="because">because</span> <span word="being">being</span> <span word="large">large</span> <span word="and">and</span> <span word="slow">slow</span> <span word="moving">moving</span> <span word="giraffes">giraffes</span> <span word="are">are</span> <span word="constantly">constantly</span> <span word="vulnerable">vulnerable</span> <span word="to">to</span> <span word="attacks">attacks</span> <span word="from">from</span> <span word="predators">predators</span>, <span word="and">and</span> <span word="therefore">therefore</span> <span word="can">can</span>’<span word="t">t</span> <span word="sleep">sleep</span> <span word="for">for</span> <span word="long">long</span> <span word="periods">periods</span>.</p>
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