Sentences with phrase «chimpanzees show»

Chimpanzees show the most diverse range of tool use outside of humans.

«My observations from wild chimpanzees show that while unexpectedly encountering a snake or snake model may trigger a startle response, they often then investigate the snake, but do not necessarily show signs of fear,» Crockford said.

This can be tested by having a chimpanzee show another how to open a puzzle box with goodies inside.

«We found that male chimpanzees showed higher object manipulation rates than females, but their object manipulation was dominated by play.

When given a choice to learn from two conspecific models, chimpanzees showed a significant preference to copy the older, higher ranking individual with a history of success in a similar context (i.e. model A in this study).

In this film's predecessor Rise of the Planet of the Apes, the portrayal of the chief chimpanzee showed that both of these are possible.

Not exact matches

Chimpanzee groups show organized moral structure, and violators are punished or even driven out of the group.

I saw a show where some lady was dressing up a chimpanzee or some kind of monkey and it was living in the house like a person.

It could have been that chimpanzees and human genomes showed no evidence of having a common ancestor.

These are three - dimensional models of chimpanzee and human skulls showing their endocranial casts (teal) and brains (purple).

Duke scientists have shown that it's possible to pick out key changes in the genetic code between chimpanzees and humans and then visualize their respective contributions to early brain development by using mouse embryos.

«In addition, high - ranking male chimpanzees are often immunosuppressed because they have high levels of testosterone and have been shown to have higher rates of parasitism.

Studies have shown that women respond to all types of sexual depictions — not only heterosexual and homosexual images but even those of chimpanzees having sex.)

«There are many studies in humans, and at least one in chimpanzees, showing that from an immunological perspective, juveniles and children are really important for maintaining diseases in populations through play and things like that,» she said.

Francys Subiaul of the George Washington University and his colleagues showed that captive chimpanzees are able to make judgments about the reputation of unfamiliar humans by observing their behaviour — whether they were generous or stingy in giving food to other humans.

The results show that basic negotiating skills may have arisen before we split from our last common ancestor with chimpanzees and bonobos, the researchers say.

The results showed that even though this hominid's brain was no larger than a chimpanzee's, it most likely walked upright like modern humans.

Now a research team led by James Anderson at the University of Stirling in the UK has shown that chimpanzees also perform «contagious yawning».

«We found that chimpanzees, orangutans and gorillas do not show a significant overlap of genes under positive selection with domesticates.

Recently, however, researchers have found that other apes, such as chimpanzees and gorillas, seem to show signs of self - awareness, including recognizing and inspecting themselves in a mirror.

Now, Vera Ludwig from the Charité University of Medicine in Berlin, Germany, and colleagues have shown for the first time that chimpanzees (Pan troglodytes) also make cross-sensory associations, suggesting these evolved early on.

The viral family tree showed that HSV - 2 was far more genetically similar to the herpes virus found in chimpanzees.

ramidus (bottom; reconstruction based on computed tomography rendering shown) lacked many features that have evolved for advanced vertical climbing and suspension in extant chimpanzees (pan, top left).

A rare «chimpanzee archaeology» dig a decade ago showed this ape has been using stone tools for more than 4000 years.

Chimpanzees, on the other hand, show a spike in testosterone.

Now, in a pair of studies, researchers show that chimpanzees will give up a treat in order to help out an unrelated chimp, and that chimps in the wild go out on risky patrols in order to protect even nonkin at home.

In 1997 Charles M. Rice, now head of the laboratory of virology and infectious disease at the Rockefeller University, showed that mutating the viral protease in hepatitis C — infected chimpanzees stopped the virus, the first clue about the enzyme's importance.

They showed the films to six chimpanzees and six bonobos, and used eye - tracking technology to record the apes» eye movements.

Point at an object, for example, and a dog will look at where you're pointing — an intuitive reading of our intentions («I'm trying to show you something») that confounds our closest relatives: chimpanzees.

A handful of fossil species dating from five million to 28 million years old, mostly before chimpanzees split from hominins, showed signs of upright posture and bipedalism, but «the evidence has been pretty flakey,» Wood says.

The massive analysis of human, chimpanzee, and monkey tissue published Nov. 23 in the journal Science shows that the human brain is not only a larger version of the ancestral primate brain but also one filled with distinct and surprising differences.

Other animals — chimpanzees, parrots, and seals — have been shown to use exclusion.

Researchers have shown the same benefit in chimpanzees and baboons that supplement their diets with clay.

Chimpanzees (Pan troglodytes) showing aggressive behavior in a tropical forest in western Uganda.

Some tests have shown that chimpanzees had some building blocks of theory of mind: They can deceive, recognize others» motives, and remember who is a good partner on collaborative tasks.

Human and chimpanzee lineages probably split about 5 million years ago and now show a 10 per cent mtDNA difference.

But Laurie Santos, a cognitive psychologist at Yale University who has shown that rhesus macaques lack an understanding of false belief, thinks the «paper raises more questions than it provides answers,» especially because there have been «so many past results showing that chimpanzees and other primates lack this capacity.»

Humans are all so closely related that our entire population shows less genetic diversity than that of a small group of chimpanzees.

Analysis of these bones has shown that the foot bones look much more like human bones than chimpanzee bones, except for two major areas: the toes of H. naledi's foot were more curved and their feet were generally flatter than seen in the average modern human.

Variations in chimpanzee intelligence have been shown for the first time to be strongly dictated by genetic inheritance, echoing findings in people

Researchers from Kent State University's College of Arts and Sciences, along with colleagues from the George Washington University, Yerkes National Primate Research Center, Georgia State University, Barrow Neurological Institute and the Icahn School of Medicine at Mount Sinai, found that the brains of aged chimpanzees, our closest living relatives, show pathology similar to the human Alzheimer's disease brain.

The genetic evidence shows that a little less than 1 per cent of the chimpanzee genome came from bonobos, from one contact between 200,000 and 550,000 years ago and another, more recent one less than 200,000 years ago.

Kent State University researchers analyzed the brains of aged chimpanzees to show pathology similar to the human Alzheimer's disease brain.

Before this study, scientists debated how these immune genes can evolve rapidly (which is necessary to keep up with the fast - evolving parasites), whilst also showing little or no evolutionary change in their function over millions of years, as observed between humans and chimpanzees.

The researchers also showed the raters tended to agree in their independent judgments of chimpanzees» personalities, suggesting the raters were not merely projecting traits onto the chimpanzees.

Male chimpanzees use buttress drumming (shown in this video) as occasional punctuation to their more common pant hoot calls.

«There's been a lot of research showing that you don't really find those same social skills in chimpanzees, but you do find them in dogs, so that suggested something superficially similar between dogs and kids,» MacLean said.

Evan MacLean, director of the Arizona Canine Cognition Center at the University of Arizona, found that dogs and 2 - year - old children show similar patterns in social intelligence, much more so than human children and one of their closest relatives: chimpanzees.

The researchers» statistical analysis of the elephants» relationships shows that female Asian elephants live in a highly dynamic and fluid society, with individuals leaving and rejoining, much as chimpanzees and bottlenose dolphins are known to do.

The researchers were surprised by the findings because these African apes — our closest relatives in the animal kingdom along with chimpanzees — have been shown to be less aggressive than chimps.