人类或由有第六感的水中动物进化
<p><span word="We">We</span> <span word="may">may</span> <span word="not">not</span> <span word="have">have</span> <span word="been">been</span> <span word="able">able</span> <span word="to">to</span> <span word="see">see</span> <span word="ghosts">ghosts</span>, <span word="but">but</span> <span word="in">in</span> <span word="our">our</span> <span word="earlier">earlier</span>, <span word="fish">fish</span>-<span word="like">like</span> <span word="form">form</span>, <span word="we">we</span> <span word="did">did</span> <span word="have">have</span> <span word="a">a</span> <span word="sixth">sixth</span> <span word="sense">sense</span>, <span word="according">according</span> <span word="to">to</span> <span word="a">a</span> <span word="study">study</span>.</p><p>我们可能真的看不到鬼怪，但是在我们类似鱼的那些时候，根据一项科学研究，我们确实是存在第六感的。</p><p><span word="Scientists">Scientists</span> <span word="have">have</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="we">we</span> <span word="are">are</span> <span word="descended">descended</span> <span word="from">from</span> <span word="a">a</span> <span word="predatory">predatory</span> <span word="fish">fish</span>-<span word="like">like</span> <span word="ancestor">ancestor</span> <span word="that">that</span> <span word="roamed">roamed</span> <span word="the">the</span> <span word="oceans">oceans</span> 500<span word="million">million</span> <span word="years">years</span> <span word="ago">ago</span> <span word="and">and</span> <span word="had">had</span> '<span word="electrosensors">electrosensors</span>' - <span word="the">the</span> <span word="ability">ability</span> <span word="to">to</span> <span word="detect">detect</span> <span word="electric">electric</span> <span word="fields">fields</span> <span word="in">in</span> <span word="water">water</span>.</p><p>科学家们发现5亿年前在海洋中食肉性的类鱼类转化而来的，这种类鱼类的动物有在水中检测电场的能力。</p><p><span word="It">It</span> <span word="used">used</span> <span word="this">this</span> <span word="skill">skill</span> <span word="to">to</span> <span word="detect">detect</span> <span word="prey">prey</span>, <span word="communicate">communicate</span> <span word="and">and</span> <span word="to">to</span> <span word="find">find</span> <span word="its">its</span> <span word="way">way</span> <span word="around">around</span>.</p><p>它用此项技能探路，与其他鱼沟通并且找到周围正确的路。</p><p><span word="Researchers">Researchers</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Cambridge">Cambridge</span> <span word="and">and</span> <span word="Cornell">Cornell</span> <span word="University">University</span> <span word="in">in</span> <span word="New">New</span> <span word="York">York</span> <span word="believe">believe</span> <span word="that">that</span> <span word="not">not</span> <span word="just">just</span> <span word="humans">humans</span>, <span word="but">but</span> 65,000 <span word="living">living</span> <span word="vertebrate">vertebrate</span> <span word="species">species</span> – <span word="that">that</span>’<span word="s">s</span> <span word="any">any</span> <span word="creature">creature</span> <span word="with">with</span> <span word="a">a</span> <span word="spine">spine</span> <span word="or">or</span> <span word="backbone">backbone</span> - <span word="are">are</span> <span word="descended">descended</span> <span word="from">from</span> <span word="the">the</span> <span word="beast">beast</span>.</p><p>在剑桥和纽约康奈尔大学的研究者却相信这不仅仅是人类的祖先，也是6万5千种活着的脊椎类动物的祖先。</p><p><span word="This">This</span> <span word="includes">includes</span> 30,000 <span word="species">species</span> <span word="of">of</span> <span word="land">land</span> <span word="animals">animals</span> - <span word="including">including</span> <span word="humans">humans</span> - <span word="and">and</span> <span word="a">a</span> <span word="similar">similar</span> <span word="number">number</span> <span word="of">of</span> <span word="ray">ray</span>-<span word="finned">finned</span> <span word="fish">fish</span>, <span word="the">the</span> <span word="scientists">scientists</span> <span word="found">found</span>.</p><p>科学家们发现这些动物包括3万种陆地动物，和一小部分鳍刺类鱼。</p><p><span word="Their">Their</span> <span word="conclusions">conclusions</span>, <span word="which">which</span> <span word="appear">appear</span> <span word="in">in</span> <span word="the">the</span> <span word="latest">latest</span> <span word="edition">edition</span> <span word="of">of</span> <span word="Nature">Nature</span> <span word="Communications">Communications</span>, <span word="mark">mark</span> <span word="the">the</span> <span word="culmination">culmination</span> <span word="of">of</span> 25 <span word="years">years</span> <span word="of">of</span> <span word="work">work</span> <span word="into">into</span> <span word="the">the</span> <span word="subject">subject</span>.</p>
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