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The results, detailed online this week in the Proceedings of the large brains, cognitive abilities and bi-pedalism.
Jianzhi Zhang of the University of Michigan and his colleagues analyzed strings of DNA from nearly 14,000 protein-coding genes shared by chimps and humans. They looked for differences gene by gene and whether they caused changes in the generated proteins.
There is still much to learn, the scientists say, about human and chimp evolution. “There are possibly a lot of differences between human and chimps that we don’t know about, [perhaps] because there are differences in chimps that nobody has studied; a lot of studies tend to focus on humans,” Bakewell said.
Originally posted by Drexon
Well of course the -DNA- is more evolved / perfected. We humans aren't efficient worth crap. We're versitile, yes, but these guys have their genes perfectly cut out for their environment. As a result we humans probably suffer more decease, genetically linked ones anyway.
We're still smarter, meaning we can adapt more, but I don't bring into question their genes are more optimized. A chimps arm muscles, even if as big as yours, are probably a heckuva lot more efficient / stronger.
This is a significant statement in regard to their findings. Given a larger population, there will be greater changes in DNA. This does not mean that Chimps are more evolved along the branch of the tree. It means that they found their niche and specialized. Humans, in a smaller population, evolved much farther along the branch and experienced a greater change since the split 6 million years ago. Today, Humans have managed to fit into a far wider environmental niche and our population far outnumbers the chimps who can only survive in limited environments.
The results could be due to the fact that over the long term humans have had a smaller effective population size compared with chimps.
Originally posted by SteveR
I began lifting weights years ago when I was 18 and kept a record of lifts.
[edit on 17/4/07 by SteveR]
Scientists at Kyoto University's Primate Research Institute have discovered that a 23-year-old female chimpanzee named Ai, who lives at the center, has mnemonic capabilities on a par with those of human adults. The experiments that established the chimp's memory span were conducted by Professor Tetsuro Matsuzawa and research fellow Nobuyuki Kawai of the institute, which is located in the city of Inuyama, Aichi Prefecture. Ai has displayed remarkable mental powers in many previous experiments, and the latest round of tests confirmed her intelligence yet again. The researchers published their findings in the January 6, 2000, issue of the English-language scientific magazine Nature.
Understanding the Concept of Zero
In one experiment, several single-digit numbers were displayed simultaneously on a computer screen, and Ai was asked to choose the smallest number. When the figures 0, 1, 4, 6, and 9 appeared, for example, Ai touched the 0. The other four numbers were then covered with squares, and Ai was asked to touch these squares in the order of the hidden numbers' values, from smallest to largest. She was able to do this highly accurately.
The monkeys were almost error-free when comparing groups with up to eight objects, but faltered when challenged with nine.
The author report an investigation of Ai's memory span by testing her skill in numerical tasks. The authors point out that humans can easily memorize strings of codes such as phone numbers and postal codes if they consist of up to 7 items, but above this number of items, humans find memorization more difficult. This "magic number 7" effect, as it is known in human information processing, represents an apparent limit for the number of items that can be handled simultaneously by the human brain.