It is used by scientists as a kind of evolutionary clock .)
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"The evolutionary clock is not linear, " he says.
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The paper, primarily Zuckerkandl's work, named the " evolutionary clock " and presented a derivation of its basic mathematical form.
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Born exactly a week ago, Rama turns back the evolutionary clock 30 million years, to a time when the common ancestor of camels and llamas lived in North America.
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Its genetic makeup also could help biologists calibrate the evolutionary clock for the bacterium and its present-day relatives, said Russell Vreeland, a study author and biologist at Pennsylvania's West Chester University.
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Many biologists think so, dismissing the possibility that a group characteristic as complex as heritable intelligence could have diverged so sharply between races in what amounts to a single tick of the evolutionary clock.
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The idea of using genetic algorithms-- gene-like mathematical models-- to set the evolutionary clock ticking " has been around a long time, " said Sims, the independent researcher who authored the " virtual creatures " program.
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Scheffer approvingly quoted the Dutch sociologist J . A . A . van Doorn as saying that the presence of immigrants in the Netherlands had " put the evolutionary clock back " by fifty years or more.
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