Human brain and muscle strength evolution intertwined?
|May 28, 2014||Posted by News under Human evolution, News|
Genomes, including the human genome, accumulate changes steadily over time. Among the genetic changes that have happened over the course of human evolution, only a few might be responsible for the rise of distinct human features. To determine what other molecules played a role in human evolution, scientists began to look beyond the genome. The international team of scientists, led by Dr Philipp Khaitovich from Shanghai, examined for the first time the evolution of the human metabolome – the compendium of metabolites present in human tissues. “Metabolites are more dynamic than the genome and they can give us more information about what makes us human”, says Khaitovich. “It is also commonly known that the human brain consumes way more energy than the brains of other species; we were curious to see which metabolic processes this involves.”
Indeed, it turned out that unlike the uniformly-paced evolution of the genome, the metabolome of the human brain has evolved four times faster than that of the chimpanzee. What was more surprising, however, is that human muscle accumulated an even higher amount of metabolic change – ten times that of the chimpanzee! More.
As I noted here:
The above is only a selection from the claims advanced for one isolated hook or another on which key parts of our fragile humanity are said to suspend. A vast, interlocking pattern of timed hooks forming a design would better account for the evidence, but it wouldn’t be Darwin. Darwinian theory, by its very nature, demands this zealous emphasis on isolated, randomly generated characteristics or events — warring trivia, basically. More.
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