Evolution Message Board - Msg: 29805595

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Politics : Evolution

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To: Greg or e who wrote (62612)	11/13/2014 4:37:09 AM
From: 2MAR$	of 69300

Its an excellent video of a series (700k views) that needs to be watched dozens of times to catch all of it. But one can also just go here, contains everything in that video & even so much more. "Evolutionary history of life" http://en.wikipedia.org/wiki/Evolutionary_history_of_life Origins of life on Earth Evolutionary tree showing the divergence of modern species from their common ancestor in the center. [43] The three domains are colored, with bacteria blue, archaea green, and eukaryotes red. Further information: Evidence of common descent, Common descent and Homology (biology) Biologists reason that all living organisms on Earth must share a single last universal ancestor, because it would be virtually impossible that two or more separate lineages could have independently developed the many complex biochemical mechanisms common to all living organisms. [44] [45] As previously mentioned the earliest organisms for which fossil evidence is available are bacteria. The lack of fossil or geochemical evidence for earlier organisms has left plenty of scope for hypotheses, which fall into two main groups: 1) that life arose spontaneously on Earth or 2) that it was "seeded" from elsewhere in the Universe. [46]

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