<div class="gmail_quote">On 16 January 2012 08:55, Kelly Anderson <span dir="ltr"><<a href="mailto:kellycoinguy@gmail.com">kellycoinguy@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
"Not only does the Earth contain more bacterial organisms than all<br>
others combined (scarcely surprising, given their minimal size and<br>
mass); not only do bacteria live in more places and work in a greater<br>
variety of metabolic ways; not only did bacteria alone constitute the<br>
first half of life's history, with no slackening in diversity<br>
thereafter;..."<br clear="all"></blockquote></div><br>This raises another interesting point, namely the fact that the maximum diversity lies at the point of origin, since each segment is of course made by the further branching of a single streak.<br>
<br>This is also true at a human level, where the maximum linguistic and genetic differences are still within the African perimeter, the rest of humankind being just the offspring of a very small group of individuals (so that everything that was not represented there got lost). <br>
<br>-- <br>Stefano Vaj<br>