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    February 20

    海蜗牛!一只!!

    我有一个叫蜗牛的同事,嵩嵩和我喜欢用各种蜗牛称呼他,例如他干活的时候称之为“懒蜗牛”,玩魔兽的时候称之为“绵羊蜗牛”,游泳的时候称之为“海蜗牛”。今天发现了一个,今天发现一只活的海蜗牛!!
     

    科学家发现,这种蜗牛在两极都有(地球的南北两极相距约1.3万公里)。最新研究显示两极海洋拥有多达235种相同物种。迄今为止,温暖的热带地区将北极的北极熊和南极的企鹅相隔离,之前仅有几种动物同时生活在南极和北极地区,比如长途迁徙的灰鲸和北极燕鸥等,它们究竟是如何进化和分布在相隔遥远的海域呢?

    这些物种如何从地球的一端来到另一端是个难解的秘密,也许要几个世纪的时间,才能完成这样漫长的迁徙。科学家说这些动物们所走的“高速路”,是由移动极为缓慢的巨大冰冷洋流组成的,它们位于海洋底层,遍布整个地球,连接起南北两极。

    这让我想起的北极熊和企鹅的故事,也同时想起了,事物之间总是相互联系着的。

    Comments (3)

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    Bourne Vwrote:
    能,不过你得一坨一坨的吃,才能饱
    Feb. 20
    惠 惠wrote:
    能吃吗?
    Feb. 20
    琳琳 魏wrote:
    你想得还真多~~~
    Feb. 20

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