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科学家通过对4亿年前的鹦鹉螺壳化石和现在的鹦鹉螺壳相比较,发现了一个惊人的秘密:在4亿年前,地球和月球的距离大约只有现在的一半。鹦鹉螺为何能推算出地月的距离呢?原来鹦鹉螺上的波状螺纹具有和树木
Scientists have discovered a surprising secret by comparing the 400-million-year-old Nautilus fossil with the current Nautilus shell: about 400,000 years ago, Earth and the Moon were about half the size of the present. Nautilus why can calculate the distance from the moon? The original nautilus wavy thread and trees