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Tag: "chimps" at biology news

Lessons from the orangutans: Upright walking may have begun in the trees

...would have evolved into the "knuckle-walking" that chimps and gorillas still use today and then into upright...from the ground or smaller trees. The ancestors of chimps and gorillas, on the other hand, became more specialized for vertical climbing between the high cano...

Man's best friend lends insight into human evolution

...em, when competing for food. But it turns out that chimps are not very good at drawing inferences about othe...evolved since the human lineage split from that of chimps a few million years ago. For Hare, who has worked with a number of different animal species, to u...

Gene study shows three distinct groups of chimpanzees

...d that the traditional, geography-based sorting of chimps into three populations—western, central and easter...mixture between the different populations and that chimps from the central and eastern populations are more closely related to each other than they are to the...

E. coli bacteria migrating between humans, chimps in Ugandan park

...ions. And some of the E. coli strains migrating to chimps are resistant to antibiotics used by humans in Uga...ocument the exchange of E. coli between humans and chimps in a protected wildlife area. It is also the first to find antibiotic-resistant strains in chimpanze...

Unraveling where chimp and human brains diverge

...ffen School of Medicine. "What sets us apart from chimps are our brains: homo sapiens means 'the knowing man.' "During evolution, changes in some genes altered how the human brain functions," he added. "Our research has identified an entirely new way to identify those genes in the small portion of our...

Comparing chimp, human DNA

... are activated and read. "The differences between chimps and humans are not in our proteins, but in how we ...rgone the most rapid change since the ancestors of chimps and humans diverged about five million years ago. They found 202 "highly accelerated regions" or ...

Evolutionary forces explain why women live longer than men

...ue to our species; the men come up short in common chimps and many other species, Kruger added. Kruger and co-author Randolph Nesse, a professor of psychology and psychiatry and director of the Evolution and Human Adaptation Program, argue that the difference in life expectancy stems from the biological ...

Researchers identify human DNA on the fast track

...d markedly in the 6 million years since humans and chimps diverged from a common ancestor. "Some DNA regions have hardly changed at all over many millions of years in most species," said Pollard. "My twist was to look for the subset of these regions that have changed just in humans." Forty-nine regions, ...

NHGRI announces latest sequencing targets

...ences between immune and inflammatory responses of chimps and humans. Identifying these genes gives researchers a more precise starting point for understanding molecular pathways and developing better diagnostics and therapies involved in immune and inflammatory diseases. In addition, some pri...

Most human-chimp differences due to gene regulation ?not genes

...the 99-percent similarity of genes from humans and chimps and suggested that altered gene regulation, rather than changes in coding, might explain how so few genetic changes could produce the wide anatomic and behavioral differences between the two. Using novel gene-array technology to measure the extent ...

Less is more, gene study shows

Humans and chimps share most of their genes, yet they differ dramati...ch is present and functional in rhesus monkeys and chimps as well as mice, but has lost its function in humans---might confer protection against severe bacter...

Primates harvest bee nests in Ugandan reserve

...etrable is the only place on earth where gorillas, chimps and humans partition forest resources. Given the importance of honey as one of the most concentrated sources of sugar and protein in the forest, and the fact that the park management plan allows collection of non-timber forest products, there is an ...

Wild Gorillas Handy with a Stick

...primatologists would describe the same behavior in chimps in Guinea. By then it was clear that nonhuman primates used objects for many tasks, from intimidating rivals and predators to taking leaf sponge baths and processing food. Still, the notion that tool use was not the sole province of human intelligenc...

Can our genes tell the story of our divergence?

...red 13,731 genes in humans to their equivalents in chimps to find positively selected genes in both species. Nielsen et al. identified many genes involved in sensory perception, as well as spermatogenesis, but found the strongest evidence for positive selection in genes related to immune defense. Immunity ...

Poaching, logging, and outbreaks of Ebola threaten central African gorillas and chimpanzees

...ies Survival Commission. ''Protecting gorillas and chimps is not just important in its own right. These animals are also flagship species, important symbols for vast areas of forest that are among the richest on Earth. Protecting them protects many other species as well." The continuing spread of the E...

Big differences in duplicated DNA distinguish chimp and human genomes

...the change to the overall genome landscape between chimps and humans can be attributed to large segmental du... copy of a segment in an ancestral species of both chimps and humans, and after the species split off from each other, that segment was duplicated many times ...

Chimp genome reveals a retroviral invasion

... Eichler and colleagues estimate that gorillas and chimps were infected about 3 -- 4 million years ago, and baboon and macaque about 1.5 million years ago. The disconnect between the evolutionary history of the retrovirus and the primates, the authors conclude, could be explained if the Old World monkeys we...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...ayed a role in the evolution of such great apes as chimps and gorillas. The research appears in the April is...mpacts on the formation of the species we now call chimps and gorillas. The virus struck when each of the primate groups was still an incipient species with w...

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