化石证明翼龙翼展可达7米
<p><span word="The">The</span> <span word="fossil">fossil</span>, <span word="which">which</span> <span word="is">is</span> <span word="a">a</span> <span word="segment">segment</span> <span word="of">of</span> <span word="tooth">tooth</span>, <span word="has">has</span> <span word="been">been</span> <span word="at">at</span> <span word="the">the</span> <span word="museum">museum</span> <span word="since">since</span> 1884 <span word="but">but</span> <span word="has">has</span> <span word="never">never</span> <span word="been">been</span> <span word="thoroughly">thoroughly</span> <span word="examined">examined</span> <span word="before">before</span>.</p><p>这块化石是牙齿的一部分。自1884年开始它就在待博物馆里了，然而以前从未被彻底检查过。</p><p><span word="Pterosaurs">Pterosaurs</span> <span word="are">are</span> <span word="flying">flying</span> <span word="reptiles">reptiles</span> <span word="that">that</span> <span word="lived">lived</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span> <span word="as">as</span> <span word="dinosaurs">dinosaurs</span>, <span word="between">between</span> 210 <span word="million">million</span> <span word="and">and</span> 65 <span word="million">million</span> <span word="years">years</span> <span word="ago">ago</span></p><p>翼龙属可飞行的爬行类动物，生活在大约在2.1亿年至6500万年之前，与恐龙生活在同一时期。</p><p><span word="It">It</span> <span word="now">now</span> <span word="has">has</span> <span word="scientists">scientists</span> <span word="thinking">thinking</span> <span word="the">the</span> <span word="extinct">extinct</span> <span word="flying">flying</span> <span word="reptile">reptile</span> <span word="had">had</span> <span word="a">a</span> <span word="wingspan">wingspan</span> <span word="of">of</span> <span word="up">up</span> <span word="to">to</span> <span word="seven">seven</span> <span word="metres">metres</span>, <span word="two">two</span> <span word="or">or</span> <span word="three">three</span> <span word="metres">metres</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="previously">previously</span> <span word="thought">thought</span>.</p><p>现如今，科学家们认为，这种已经灭绝的、可飞行的爬行类动物的翼展可达到7米长，比先前的设想要长2米或者3米。</p><p><span word="David">David</span> <span word="Martill">Martill</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> <span word="and">and</span> <span word="David">David</span> <span word="Unwin">Unwin</span> <span word="from">from</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Leicester">Leicester</span> <span word="reported">reported</span> <span word="the">the</span> <span word="discovery">discovery</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Cretaceous">Cretaceous</span> <span word="Research">Research</span>.</p><p>英国朴茨茅斯大学的大卫·马提尔以及英国莱斯特大学的大卫·昂温在《白垩纪研究》期刊上报道了这个发现。</p><p>“<span word="Early">Early</span> <span word="pterosaurs">pterosaurs</span> <span word="were">were</span> <span word="relatively">relatively</span> <span word="small">small</span>, <span word="with">with</span> <span word="wing">wing</span>-<span word="spans">spans</span> <span word="not">not</span> <span word="much">much</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="a">a</span> <span word="crow">crow</span>,”<span word="said">said</span> <span word="Dr">Dr</span> <span word="Martill">Martill</span>. “<span word="These">These</span> <span word="early">early</span> <span word="pterosaurs">pterosaurs</span> <span word="all">all</span> <span word="had">had</span> <span word="a">a</span> <span word="mouth">mouth</span> <span word="full">full</span> <span word="of">of</span> <span word="teeth">teeth</span>, <span word="usually">usually</span> <span word="small">small</span> <span word="at">at</span> <span word="the">the</span> <span word="back">back</span> <span word="and">and</span> <span word="larger">larger</span> <span word="at">at</span> <span word="the">the</span> <span word="front">front</span>.”</p><p>马提尔博士说：“早期翼龙相对较小，翅展比乌鸦大不了多少。这些早期翼龙嘴里都长满了牙齿，通常来说，小的牙齿长在后面，大的牙齿长在前面。”</p>
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