Original of life 영문 타이핑

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was one of the first creatures to emerge fromthe sea and to breathe in the air now abundant in oxygen. It joined the plants and insects that had proceeded it and inaugurated a whole new saga as the vertebrate began their conquest of the continents. One chapter was over, another was ready to begin. Life began in water four billion years ago. It has existed on dry land for only 400 million years.

키워드

Our universe was born some fifteen billion years a,   Oxygen given off by algae monopolized more and mor,   A sperm cell could now merged with an ovule and pr