Evolution3 Major Themes in Evolution The world around us changes. This simple fact is obvious everywhere we look. Streams wash shit and stones from higher places to lower places. Untended gardens fill with weeds. Other changes are more gradual but much more outstanding when viewed over long time scales. Powerful telescopes reveal newborn stars coalescing from galactic dust, just as our sunbathe did more than 4.5 zillion years ago. The earthly concern itself formed shortly thereafter, when rock, dust, and gas circling the sun condensed into the satellites of our solar system.
Fossils of primitive microorganisms show that life had emerged on earth by about 3.8 billion years ago. Similarly, the fossil remember reveals profound changes in the kinds of living things that have inhabited our planet over its long history. Trilobites that populated the seas hundreds of millions of years ago no longer crawl about. Mammals now live in a world that was once dominated by reptilian giants su...If you necessity to get a full essay, order it on our website:
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