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There are a number of '''theories of evolution'''.  In 2000, scientist Simon Conway Morris wrote in the peer-reviewed [[science]] journal ''Cell'': "When discussing organic [[evolution]] the only point of agreement seems to be: 'It happened.' Thereafter, there is little consensus, which at first sight must seem rather odd." He uses this statement to introduce a call for more investigation into the mechanisms of evolution.<ref>http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WSN-4195FC1-1&_user=681891&_coverDate=01%2F07%2F2000&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000037419&_version=1&_urlVersion=0&_userid=681891&md5=1806889a6d57f9282db2e4c04d32e8f7</ref>

There are a number of '''theories of evolution'''.  In 2000, scientist Simon Conway Morris wrote in the peer reviewed [[science]] journal ''Cell'': "When discussing organic [[evolution]] the only point of agreement seems to be: 'It happened.' Thereafter, there is little consensus, which at first sight must seem rather odd."<ref>http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WSN-4195FC1-1&_user=681891&_coverDate=01%2F07%2F2000&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000037419&_version=1&_urlVersion=0&_userid=681891&md5=1806889a6d57f9282db2e4c04d32e8f7</ref>