考古新发现：人类的祖先是老鼠
<p><span word="As">As</span> <span word="ancestors">ancestors</span> <span word="go">go</span>, <span word="it">it</span> <span word="might">might</span> <span word="not">not</span> <span word="look">look</span> <span word="particularly">particularly</span> <span word="distinguished">distinguished</span>, <span word="but">but</span> <span word="this">this</span> <span word="toothy">toothy</span> <span word="rat">rat</span>-<span word="like">like</span> <span word="creature">creature</span> <span word="is">is</span> <span word="the">the</span> <span word="forefather">forefather</span> <span word="of">of</span> <span word="us">us</span> <span word="all">all</span>. <span word="Remains">Remains</span> <span word="of">of</span> <span word="the">the</span> <span word="little">little</span> <span word="nocturnal">nocturnal</span> <span word="mammal">mammal</span>, <span word="which">which</span> <span word="lived">lived</span> 145 <span word="million">million</span> <span word="years">years</span> <span word="ago">ago</span>, <span word="were">were</span> <span word="recently">recently</span> <span word="discovered">discovered</span> <span word="on">on</span> <span word="the">the</span> <span word="Jurassic">Jurassic</span> <span word="Coast">Coast</span> <span word="of">of</span> <span word="Dorset">Dorset</span>, <span word="by">by</span> <span word="paleontologists">paleontologists</span> <span word="from">from</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Portsmouth">Portsmouth</span>.</p><p>考古发现，上图这种长相和老鼠类似的啮齿动物是人类的祖先，虽然这位祖先的外貌不是很出众。近日，朴茨茅斯大学的古生物学者们在多赛特郡的侏罗纪海岸发现了这种生活在1.45亿年前的小型夜行哺乳动物的残骸。</p><p><span word="The">The</span> <span word="animal">animal</span> <span word="is">is</span> <span word="the">the</span> <span word="earliest">earliest</span> <span word="in">in</span> <span word="a">a</span> <span word="line">line</span> <span word="that">that</span> <span word="would">would</span> <span word="eventually">eventually</span> <span word="lead">lead</span> <span word="to">to</span> <span word="humans">humans</span>, <span word="as">as</span> <span word="well">well</span> <span word="as">as</span> <span word="branching">branching</span> <span word="off">off</span> <span word="along">along</span> <span word="the">the</span> <span word="way">way</span> <span word="to">to</span> <span word="evolve">evolve</span> <span word="into">into</span> <span word="creatures">creatures</span> <span word="as">as</span> <span word="diverse">diverse</span> <span word="as">as</span> <span word="Blue">Blue</span> <span word="Whales">Whales</span> <span word="and">and</span> <span word="Pigmy">Pigmy</span> <span word="Shrews">Shrews</span>.</p><p>这种远古动物最终会进化为人类，而且在演变过程中，还会进化成蓝鲸和鼩鼱等多种不同生物。</p>
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