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Tag: "orangutans" at biology news

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

...itain, came to their conclusions by observing wild orangutans in Sumatra, Indonesia. Orangutans spend almost the... rainforest and recording virtually every move the orangutans made. Then, she and her colleagues used these observations to test the hypothesis that bipedalism wo...

Study suggests evolutionary link between diet, brain size in orangutans

In a study of orangutans living on the Indonesian islands of Borneo and Sum...sed on their comparative study, the scientists say orangutans confined to part of Borneo where food supplies are frequently depleted may have evolved through the ...

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

...n of more than 1,000 genes between humans, chimps, orangutans and rhesus macaques ?representing about 70 million years of evolution. To make the samples comparable, the researchers studied tissue from the liver -- one of the most homogeneous sources -- from five adult males from each of the four species. They ...

Genetic study shows humans have pushed orangutans to the brink of extinction

...rom tree nests and feces found under nests or near orangutans encountered along the Kinabatangan River. Two hundred orangutans were identified using genetic markers called microsatellites. "We used the DNA information to simula...

Wild Gorillas Handy with a Stick

... for termites and rocks to crack nuts in the wild; orangutans use sticks to extract seeds from the spiny, sharp husk of Neesia fruits in the wild, and bonobos use various tools, including moss as sponges and leafy twigs to swat away bees.) That no one has ever observed wild gorillas using tools—despite decades ...

Scientists analyze chromosomes 2 and 4

...mosomes ?one less pair than chimpanzees, gorillas, orangutans and other great apes. For more than two decades, researchers have thought human chromosome 2 was produced as the result of the fusion of two mid-sized ape chromosomes and a Seattle group located the fusion site in 2002. In the latest analysis, resea...

Chimp genome reveals a retroviral invasion

...ce. As for how this retroviral infection bypassed orangutans and humans, the authors offer a number of possible scenarios but dismiss geographic isolation: even though Asian and African apes were mostly isolated during the Miocene era (spanning 24 to 5 million years ago), humans and African apes did overlap. I...

Primates on the brink

...on's threatened primates are taken as pets-notably orangutans and gibbons -they are most often hunted and traded for use in traditional medicines. Most of this trade appears to be international, primarily to China." As "Flagship Species" and our closest living relatives, nonhuman primates are important to the ...

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

...fect the ancestors of humans or of Asian apes like orangutans and gibbons. The infections took place independently, and did not originate in a common ancestor of humans and apes. The event also took place between three and four million years ago, well after the separation of humans from apes. That split is esti...

Oldest fossil human protein ever sequenced

...sequences of Neanderthals, humans, chimpanzees and orangutans from that of gorillas and most other mammals. This...nivorous primates such as humans and Neanderthals, orangutans and chimpanzees. Therefore, the ability to form proteins without the presence of vitamin C may have ...

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