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| | How Old is Humanity? |
 | | For example, a recent issue of Science (Collins, F., M. Guyer, and A. Chakravarti, "Variations on a Theme: Human DNA Sequence Variation," Science 278:1580-1581, 28 November 1997, page 1581) said that the age of the human race is roughly 1,000 to 10,000 generations: |
 | | This means that the Y chromosome will tend to mutate twice as fast as other chromosomes, since it is always in the male line, which might reduce this estimate of about 40,000 years to about 20,000 years. |
 | | Yet another piece of evidence is the tremendous uniformity found among humans in a 50 kb segment of an ALU region of the nuclear DNA (Proc. |
| www.cs.unc.edu /~plaisted/ce/humanity.html (2165 words) |
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