追求人类起源
<p>同学们，你们知道吗？我们最早的祖先是谁吗？是你爷爷的爷爷的爷爷……然后无限循环下去吗？不，就让我来给大家一代一代地讲诉吧！</p><p><span word="Students">Students</span>, <span word="do">do</span> <span word="you">you</span> <span word="know">know</span>? <span word="Who">Who</span> <span word="are">are</span> <span word="our">our</span> <span word="earliest">earliest</span> <span word="ancestors">ancestors</span>? <span word="It">It</span>'<span word="s">s</span> <span word="your">your</span> <span word="grandfather">grandfather</span>'<span word="s">s</span> <span word="grandfather">grandfather</span>'<span word="s">s</span> <span word="grandfather">grandfather</span> <span word="And">And</span> <span word="go">go</span> <span word="on">on</span> <span word="forever">forever</span>? <span word="No">No</span>, <span word="let">let</span> <span word="me">me</span> <span word="tell">tell</span> <span word="you">you</span> <span word="about">about</span> <span word="it">it</span> <span word="from">from</span> <span word="generation">generation</span> <span word="to">to</span> <span word="generation">generation</span>!</p><p>早在公元前800万年~公元前700万年，有一种动物叫“古猿”，也就是人类和类人猿共同的祖先。“南方古猿”就由“古猿”进化而来的，这种“南方古猿”早在公元前420万年~100万年，这种“南方古猿”大脑容量小，以足直立，步履蹒跚，喜欢攀援。“能人”是从“南方古猿”进化而来的，“能人”生活在公元前200万年~175万年，“能人”能制造简单的工具，已经初步具有语言能力。从“能人”进化而来的就是“直立人”在公元前200万年~20万年。他们开始懂得用火，奔跑，还能制作石器，开始吃熟食。“智人”模样与现代人基本相同，早在早期公元前20万年~5万年，晚期在公元前5万年~1万年，“智人”已经能够制作精巧的石器作品，还能用兽杖制衣，还发明了葬仪。</p><p><span word="As">As</span> <span word="early">early</span> <span word="as">as</span> 8 <span word="million">million</span> <span word="to">to</span> 7 <span word="million">million</span> <span word="B">B</span>.<span word="C">C</span>., <span word="there">there</span> <span word="was">was</span> <span word="an">an</span> <span word="animal">animal</span> <span word="called">called</span> "<span word="ancient">ancient</span> <span word="ape">ape</span>", <span word="that">that</span> <span word="is">is</span>, <span word="the">the</span> <span word="common">common</span> <span word="ancestor">ancestor</span> <span word="of">of</span> <span word="human">human</span> <span word="and">and</span> <span word="anthropoid">anthropoid</span> <span word="ape">ape</span>. "<span word="Australopithecus">Australopithecus</span>" <span word="evolved">evolved</span> <span word="from">from</span> "<span word="Australopithecus">Australopithecus</span>". <span word="This">This</span> <span word="kind">kind</span> <span word="of">of</span> "<span word="Australopithecus">Australopithecus</span>" <span word="dates">dates</span> <span word="back">back</span> <span word="to">to</span> 4.2-1 <span word="million">million</span> <span word="B">B</span>.<span word="C">C</span>. <span word="the">the</span> <span word="brain">brain</span> <span word="capacity">capacity</span> <span word="of">of</span> <span word="this">this</span> "<span word="Australopithecus">Australopithecus</span>" <span word="is">is</span> <span word="small">small</span>, <span word="standing">standing</span> <span word="upright">upright</span> <span word="with">with</span> <span word="feet">feet</span>, <span word="hobbling">hobbling</span> <span word="and">and</span> <span word="likes">likes</span> <span word="climbing">climbing</span>. "<span word="Capable">Capable</span> <span word="man">man</span>" <span word="evolved">evolved</span> <span word="from">from</span> "<span word="Australopithecus">Australopithecus</span>", <span word="who">who</span> <span word="lived">lived</span> <span word="from">from</span> 2 <span word="to">to</span> 1.75 <span word="million">million</span> <span word="B">B</span>.<span word="C">C</span>. <span word="and">and</span> <span word="can">can</span> <span word="make">make</span> <span word="simple">simple</span> <span word="tools">tools</span>, <span word="and">and</span> <span word="has">has</span> <span word="preliminary">preliminary</span> <span word="language">language</span> <span word="ability">ability</span>. <span word="What">What</span> <span word="evolved">evolved</span> <span word="from">from</span> <span word="Homo">Homo</span> <span word="habilis">habilis</span> <span word="was">was</span> <span word="Homo">Homo</span> <span word="erectus">erectus</span> <span word="from">from</span> 2 <span word="to">to</span> 200000 <span word="B">B</span>.<span word="C">C</span>. <span word="They">They</span> <span word="began">began</span> <span word="to">to</span> <span word="know">know</span> <span word="how">how</span> <span word="to">to</span> <span word="use">use</span> <span word="fire">fire</span>, <span word="run">run</span>, <span word="make">make</span> <span word="stone">stone</span> <span word="tools">tools</span> <span word="and">and</span> <span word="eat">eat</span> <span word="cooked">cooked</span> <span word="food">food</span>. <span word="As">As</span> <span word="early">early</span> <span word="as">as</span> 200000-50000 <span word="B">B</span>.<span word="C">C</span>. <span word="and">and</span> 50000-10000 <span word="B">B</span>.<span word="C">C</span>. <span word="in">in</span> <span word="the">the</span> <span word="later">later</span> <span word="period">period</span>, "<span word="Zhiren">Zhiren</span>" <span word="has">has</span> <span word="been">been</span> <span word="able">able</span> <span word="to">to</span> <span word="make">make</span> <span word="exquisite">exquisite</span> <span word="stone">stone</span> <span word="works">works</span>, <span word="make">make</span> <span word="clothes">clothes</span> <span word="with">with</span> <span word="animal">animal</span> <span word="sticks">sticks</span> <span word="and">and</span> <span word="invent">invent</span> <span word="funerals">funerals</span>.</p>
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