chimpanzee

After a year, Dr. Leakey asked me if I would undertake a field study of chimpanzees.

What he did say was that we, and apes, and chimpanzees for that matter, had a common ancestor, once, a long, long time ago.

"We have been trying to keep strong relationship with the chimpanzees, " lead researcher Satoshi Hirata told BBC News.

Researchers might not ever know how much of the chimpanzees' behaviors were stemming from emotions analogous to grieving humans.

Immunisation of four chimpanzees with the candidate vaccine resulted in a detectable and sustained immune response for at least six months.

The most terrible of chimpanzees, I never thought the gorilla would be so big, just like a hill.

One of the clearest places to look for clues of our cultural capacity is in one of our closest relatives: chimpanzees.

Being out on my own in nature, with or without the chimpanzees, is just something I loved.

Chimpanzees, elephants, buffaloes and a reddish-brown antelope known as the bongo also occur in this protected area.

Unfortunately for the chimpanzees of Kibale, they are not the only combatants locked in a central African territorial dispute.

Primatologists aren't sure, for example, if chimpanzees collaborate in the wild or, if they do, how much.

I would hesitate to describe what pygmy chimpanzees, orangutans or long-eared hedgehogs get up to, even in a liberal newspaper.

If you re lucky, the chimpanzees will be drawing on poster board with crayons. Some of their works have been shown in galleries.

Chimpanzees even appear capable of altruism, being willing to help strangers in the absence of anticipated reward.

Female chimpanzees treat sticks and small logs as dolls by cuddling them, creating games and even putting them to bed, new research finds.

Chimpanzees, the closest genetic relatives of humans, use a few dozen calls and a variety of gestures to communicate in the wild.

After watching the ads, the participants filled out a questionnaire that assessed their understanding of the status of wild chimpanzees.

but chimpanzees also smile when they're trying to strengthen a social bond with another chimpanzee.

A retrovirus that has lain dormant in chimpanzees and their ancestors for at least one million years is surrendering its secrets.

Young female chimpanzees like to play with sticks as if they were dolls, according to a new study in the journal Current Biology.

DEATH OF A FRIEND: When chimpanzees die of untimely, accidental deaths, their companions have been known to go into a frenzy.

We showed the very robust evidence that chimpanzees can be better than humans in a memory task.

Provine and other scientists have studied chimpanzees and found a link between their laughter-like noises and human laughter.

Importantly, female chimpanzees (unlike female humans) do not experience menopause, and thus can remain fertile into old age.

While chimpanzees are social creatures, they don't show a preference for collaborating with one another, an October study finds.

Jane was prepared to go to the jungle on her own, to explore the lives of chimpanzees.

Our ancestors are believed to have evolved in a less forested, more open grassland environment than our cousins, the chimpanzees.

Bonobo chimpanzees display their physical interest in one another directly and ceaselessly, performing sex acts as greetings.

It's the question of, why are we so different from the chimpanzees?

Chimpanzees have been documented as having bloody feuds with each other, resulting over territorial or other differences.

Language studies had been made using chimpanzees before, but never with a gorilla.

The chimpanzees and humans were each briefly shown four to nine numerals at a time scattered across a touchscreen.

The search continues for the 'last common ancestor' from which both modern humans and modern chimpanzees can trace their ancestry.

No one can imagine that chimpanzees - young chimpanzees at the age of five - have a better performance in a memory task than humans.

She wanted to be Jane Goodall. But instead of chimpanzees, her animals would turn out to be killer whales.

In the aspect of using tools, corvus frugileguses is as smart as chimpanzees and Corvusmoneduloides who are skilled in tools, " he said. "

Simian immunodeficiency virus to chimpanzees brought significantly less than the harm to human immunodeficiency virus harm to human beings.

Neanderthals turn out to have the same version of FOXP2 as Homo sapiens (and thus a different one from chimpanzees).

They found evidence the parasite that causes most cases of malaria is a close genetic relative of a parasite found in chimpanzees.

Shared intentionality, in Dr. Tomasello's view, is close to the essence of what distinguishes people from chimpanzees.

The differences between chimpanzees and us cannot be accounted for by differences in these proteins.

The scientists tested three pairs of mother and infant chimpanzees against nine university students in a memory task involving numerals.

Americans have to decide if the benefits to humans of research using chimpanzees outweigh the ethical, financial and scientific costs.

Nevertheless, her understanding comes with sustained intellectual effort: she studies people as primatologists study chimpanzees.

Contagious yawning is a different story. Only humans, chimpanzees and possibly dogs have been shown to do it.

Attached to that email was a picture of Obama as the son of chimpanzees.

In reality, of course, chimpanzees are endangered and face an uncertain future in Africa due to habitat destruction, disease, and hunting.

Chimpanzees do have small sensory whiskers, not as externally obvious as in cats or mice, but we don't have them at all.

For instance, I know chimpanzees have demonstrated abstract thought. But baboons are on a whole different limb of the evolutionary tree.

By contrast, captive chimpanzees have been seen caring for a dying companion.

As a species, we're basically chimpanzees plus a sense of shame.

It has been 50 years since the scientist turned eco-evangelist began her seminal work with chimpanzees in Africa.

Some features of her skull, such as the ridge above the eye socket, are quite different from those of chimpanzees.

Some scientists trace warfare all the way back to the common ancestor we shared with chimpanzees, our closest genetic relatives.

Moreover, even the mere confinement in laboratory cages deprives chimpanzees of basic physical, social and emotional sustenance.

After about six months, most of the chimpanzees would sit and look at me calmly at distances of 100 yards.

Consolation was most likely to occur between chimpanzees who already had valuable relationships, Fraser added.

Scientists know chimpanzees are one of the most intelligent animals.

Capuchins share meat for the same reason chimpanzees (and people) do: there can be no joint hunting without joint payoffs .

Villagers at Bossou do not eat chimpanzees because they think of chimps as the reincarnation of their ancestors.

What rapidly became known in the popular media as the "gay plague" had jumped the species barrier from chimpanzees decades before.

While chimpanzees nested in trees at night, a field assistant below them caught urine in a plastic bag held between a forked twig.

Get the wild chimpanzees to accept you, observe their behaviors, and describe what you see.

Others have seen signs of a bent-knee, bent-hip stride characteristic of modern chimpanzees.

WHEN it comes to researching intelligence in primates, chimpanzees and orangutans get all the attention.

Other studies have found that these Pygmy Chimpanzees have been found to laugh at rudimentary, childish human jokes.

Scientists also hypothesized that feathered dinosaurs had lice and determined that yawns are contagious among chimpanzees.

About 2m years ago it began to grow in size, and today it is about three times larger than that of chimpanzees, man's closest relative.

Sometimes I saw a group of chimpanzees feeding in a tree, but seldom managed to get close before the shy apes moved away.

Zoologists also make a distinction between great apes(including gorillas and chimpanzees)and lesser apes.

Both he and primatologist Jane Goodall have observed chimpanzees dancing with total abandon at waterfalls that emerge after heavy rains.

His focus was on determining the exact time when the virus made its leap to the human species from chimpanzees.

Hare had heard filmmakers express this opinion while helping with two television documentaries about chimpanzees.

It follows that bonobos and chimpanzees share many human-like morphological, physiological and behavioral traits.

Scientists have identified the receptor used by a virus that plagued chimpanzees' ancestors.

They found that the sperm-producing tissue lining gorillas' testes was much thinner than that of orangutans and chimpanzees.

From my mountaintop perch, I observed how chimpanzees go to bed.

There is no question that chimpanzees experience pain, stress and social isolation in ways strikingly similar to the way humans do.

Social living requires empathy , which is especially evident in chimpanzees, as well as ways of bringing internal hostilities to an end.

Chronic and traumatic stress harms chimpanzees' health and compromises the results of experiments conducted on them.

Her research went on to show many other striking similarities between humans and chimpanzees.

The chimpanzees during much of the year move about in small groups of three to six animals.

Chimpanzees were nearly four times more likely to wait for the big reward than humans were.

Similarly, when coula nuts were the majority resource, the chimpanzees ignored the oil palm nuts altogether.

Many federally owned chimpanzees were bred to support AIDS research, but later proved inferior to more modern technologies.

Similar patterns have been observed in chimpanzees, bonobos and modern humans.

GORILLAS are gentle giants, chimpanzees aggressive killers and bonobos sex-crazed vegetarians.

The study implies that chimpanzees view others as social tools, as a means of maximizing their own rewards.

If another banana piece for each was added to the partner board, the chimpanzees overwhelmingly choose to collaborate.

Chimpanzees, gorillas and bonobos possess self-awareness, feelings and high-level cognitive powers.

In a precedent-setting move, the Spanish Parliament recently voted to extend basic rights to chimpanzees and other great apes.

We are still underestimating the intellectual capability of chimpanzees, our evolutionary neighbours.

Chimpanzees are the best natural experiment we will ever have for exploring this central question.

Chimpanzees sometimes smile not for pleasure or for a social bond, but for power.

Capuchin monkeys are famously shrewd and resourceful primates, the New World equivalent of chimpanzees.

chimpanzees regarded the coula nuts The as a more highly-prized resource and competed for them more intensely.

We branch off of a common ancestor to modern chimpanzees about six or eight million years ago.

But it wasn't. He was born in a cage in Oklahoma, in a breeding facility for chimpanzees.

That they increase in frequency in holding areas suggests the chimpanzees feel bad in these places.

There's probably less debate about why humans reap benefits from having larger brains than chimpanzees, Kingsley said.

The researchers trained observers to monitor seven chimpanzees and seven gorillas in both the holding areas and the enclosures.

masked or pale-faced chimpanzees of western Africa; distantly related to the eastern and central chimpanzees; possibly a distinct species.

Chimpanzees and humans are fairly close cousins, evolutionarily speaking.

Chimpanzees are so like us, that they blur the line once perceived as so sharp between humans on the one side and non-humans on the other.

The first, which has spread around the world, clearly came from chimpanzees, as did N and O.

WHEN wondering about the origins of our brain, don't look to Homo sapiens, chimpanzees, fish or even worms.

Last week, a team of scientists reported confirmation that H. I. V. came from chimpanzees in the nearby country of Cameroon.

Chimpanzees and other apes do not helpfully inform each other about things.

She found the majority of adult chimpanzees and bonobos had special wrist features that most gorillas lacked.

The Bloemfontein Zoo says Charlie passed away Tuesday at the age of 52, at least ten years beyond the average life span for chimpanzees.

Female chimpanzees, for instance, typically leave their social group once they hit maturity.

They discovered that chimpanzees and elephants have the best memory.

The evidence is in the changes that took place when we evolved from ancestors that were like chimpanzees but were already standing upright.

Previous studies have shown that HIV spread from chimpanzees to humans in southeastern Cameroon.

Researchers observed warlike behavior on a regular basis among chimpanzees living in Ngogo in Uganda's Kibale National Park.

This astounded39 Jane; chimpanzees had been thought of as herbivores40, who occasionally41 ate small bugs.

At different genes, humans share a common genetic ancestor with chimpanzees at different times.

These are orphan chimpanzees that were born in the forest. Once being taken out of the wild, the chimpanzees can never be returned.

New research in chimpanzees and monkeys could reveal clues about how self-control originated in humans.

Humans can easily identify with the emotional expressions of chimpanzees.

Chimpanzees had never before been seen or recorded as eating meat.

The Kenyanthropus fossil has a small earhole , like those of chimpanzees.

Chimpanzees, bonobos, elephants, and many birds work together for joint rewards.

But they also showed numerous changes of behaviour that were different from those seen in chimpanzees.

Chimpanzees and their bonobo cousins are known to hunt and eat other mammals, including monkeys.

Bonobos are, together with chimpanzees, your living closest relative.

The virus is HIV's closest known relative but is not known to cause disease in chimpanzees.

Also, male chimpanzees have smaller penises than humans, and their penises have spines.

Most astonishing of all, I saw chimpanzees fashion and use crude implements-the beginnings of tool use.

Although adult chimpanzees are also known to use sticks, they use them as foraging tools, not toys.

Many more genes separate humans from chimpanzees than scientists believed.

Six million years ago, chimpanzees and humans diverged from a common ancestor and evolved into unique species.

Scientists say they have genetic proof malaria spread by mosquitoes jumped species from chimpanzees to humans.

The bill would phase out invasive research on great apes and retire the 500 federally owned chimpanzees from laboratories to sanctuaries.

It is rare in monkeys and limited in the great apes, including chimpanzees and gorillas.

Scientists have also mapped the DNA of mammals , including chimpanzees, dogs, cats and cows.

I believe gorillas ; chimpanzees and orangutans will all become extinct in the wild .

While chimpanzees are dominated by big, scary guys, bonobo society is run by empowered females.

Chimpanzees are the first primate shown to get sick in the wild in significant numbers from a virus related to HIV.

The antibodies will be given to chimpanzees to see whether they can block an HIV-like virus.

A new study of genes in humans and chimpanzees pins down with greater accuracy when the two species split from one.

It seems humans have more in common with chimpanzees and gorillas than perhaps we'd like to admit.

For Chimpanzees, our closest relatives, the similarities in our genetic code has surprised even the experts.

Chimpanzees have them as well.

The children in the study got gummy frogs as their treat, while the chimpanzees got bananas.

The Congo Basin is especiallyspecies-rich; the Ituri forest is home to okapis, chimpanzees, leopards, and elephants.

"Young chimpanzees are superior to human adults in the immediate memory of details, " Matsuzawa told LiveScience.

Its immediate ancestor is probably also relatively new to chimpanzees.

Gene tests of feces identified individual chimpanzees.

In England, before I commenced my field study, I met one or two people who had seen chimpanzees in the wild.

Around this time, Goodall noted a split was taking place among Gombe's chimpanzees.

This means that the social chimpanzees are smarter than the solitary orangutan.

and that can spell trouble for chimpanzees. Mahale is a tourist destination in Tanzania.

In 1960 a spirited animal lover with no scientific training set up camp in Tanganyika's Gombe Stream Game Reserve to observe chimpanzees.

No matter where the researchers looked, they found the human brains lost significant volume over time, while the chimpanzees didn't.

And it's not limited to humans, either. Even wild animals like chimpanzees and elephants exhibit jealous tendencies.

And the ones that stayed on in Africa evolved into the gorillas, the chimpanzees and us.

Sitting up there, in that place of memories, I reflected on the plight of chimpanzees and other wild animals in Africa today.

Researchers Matthew Campbell and renowned primatologist Franz de Waal, studied 23 chimpanzees who live in two separate groups.

the earliest ancestors of humans that stood upright resembled chimpanzees facially.

And helping behavior can even be seen in infant chimpanzees under the right experimental conditions.

The scientists found nearly identical S. I. V. cpz viruses in four chimpanzees.

Would you believe that chimpanzees have sex for "money" ?

Even chimpanzees' imitation is limited to a small range of behaviors, such as methods of fishing for termites .

Species from squids to chimpanzees have been caught doing it from time to time.

'We found no age-related changes in chimpanzees, ' said Dr. Sherwood.

For the first time, scientists have shown that chimpanzees in the wild become sick and die from the simian version of AIDS.

With chimpanzees, rearing is relegated to females.

Most interesting was what the scientists discovered about the X chromosome in humans and chimpanzees.

A similar phenomenon can be seen in modern chimpanzees and gorillas that live in the same geographical area.

The university students were slower than all of the three young chimpanzees in their response.

People often ask me how I choose such names for individual chimpanzees.

For a long time, people thought chimpanzees weren't good at recognizing faces.

one way of looking at these questions is to compare people with their closest relatives , great apes such as chimpanzees.

Chimpanzees sometimes smile from pleasure, as when baby chimps play with each other.

Humans and Chimpanzees shared their last common ancestor around 7 million years ago , and have since followed separate evolutionary paths .

But then I thought, "But why be rude to chimpanzees? "

Unlike chimpanzees and other primates, elderly humans are prey to a host of neurodegenerative diseases, such as Alzheimer's disease.

The leading theory is that it was picked up by people who hunted or ate infected chimpanzees.

What she discovered would change not only our understanding of chimpanzees but ultimately, of human behaviour itself.

Scientists have created a vaccine for hepatitis C that can induce an immune response in chimpanzees.

We scientists have proved pretty conclusively that chimpanzees can suffer, that they can anticipate arriving pain.

But our primate relatives, such as chimpanzees, have the switch, and that's why they differ from us in these two ways.

Two baby chimpanzees were infected.

I saw chimpanzees in the wild hunt and kill for meat.

Richerson has a wonderful analogy to show how far this process has gone in humans, compared to chimpanzees.

Your mother was here with other chimpanzees.

Past research reveals that nonhuman male primates (such as baboons and chimpanzees) are attracted to females displaying red.

I readily admit that I was fond of certain chimpanzees.

Experiments on great apes, such as chimpanzees and gorillas, are expressly forbidden in Britain, although smaller monkeys may be used.

We share many things with chimpanzees.

Chimpanzees also use a system of different sounds to communicate with each other.

The virus could give the chimpanzees a human level of intelligence.

Chimpanzees are nomadic within their territory, and they follow no fixed circuit.

For a long time people used chimpanzees in medical research because of all the amazing biological similarities.

Chimpanzees rarely even offer food to their own offspring.

In certain seasons, mainly when some kind of favorite fruit is plentiful, I have often seen as many as 25 chimpanzees together.

Chimpanzees also have a similar expression when they laugh: an open-mouthed , relaxed smile.

Chimpanzees often hunt in large groups, 30 to 50, and move quickly through the forest.

Gombe was once home to about 150 chimpanzees in three communities.

Juveniles were defined as chimpanzees between the ages of five and 7. 9.

When the rare coula nuts were available only in small numbers, the chimpanzees transported more at one time.

Subproject 62 documents "certain kinds of radio frequency energy have been found to effect reversible neurological changes in chimpanzees. "

Yes. she observes and studias chimpanzees.

Chimpanzees will touch hands to greet each other.

HIV, the AIDS-causing virus, lived happily and benignly in chimpanzees before it became a scourge of people.

Growing human pressures on the park threaten the chimpanzees' very existence.

Now, chimpanzees are well-known for their aggression.

As a result, most of the 500 federally owned chimpanzees are idling in warehouses.

Scientists believe men once had small spines on their genitalia such as those found in chimpanzees, cats and mice.

Did you knowthat chimpanzees can trounce humans in short-term memory games?

Sometimes the chimpanzees were given toys, such as magazines or toothbrushes.

She and colleagues studied food-raids made by wild male chimpanzees in the village of Bossou in the Republic of Guinea.

One of Leakey's interests was to study wild chimpanzees to gain insight into the evolutionary past of humans.

The Ebola virus is deadly to both people and primates, such as gorillas and chimpanzees.

Based on what we know, I'd guess that cetacean culture is intermediate between humans and chimpanzees.

Chimpanzees are social animals that live in bands.

Chimpanzees, killer whales, these kinds of creatures, they have culture.

In this case, chimpanzees teaching each other how to crack nuts with rocks.

Some primates, such as chimpanzees and orangutans, are now regarded as having cultural traditions but not aesthetics.

I began my work in Africa 50 years ago, studying the chimpanzees of Gombe National Park in Tanzania.

nonhuman primates such as chimpanzees.

Humans and chimpanzees share more than 97% of DNA, but there are some fairly obvious differences in appearance, behavior and intellect.

For example, chimpanzees in captivity showed a thirty-three percent increase in weight each decade.

Professor Matsuzawa Tetsuro has been studying chimpanzees closely for the past 30 years.

For example, chimpanzees use sticks to get white ants out of the ground. They even teach each other how to use tools.

Female baboons and chimpanzees redden when nearing ovulation, for example.

Could we protect the chimpanzees if we helped the people?

In America alone there are also more than 1, 800 chimpanzees in unaccredited zoos, sanctuaries, laboratories and private homes.

As The Economist went to press, the legislature was debating a budget that one senator described as having been written by chimpanzees .

Starting in 2000, the scientists followed 94 chimpanzees in the park.

One of Leakey's interests was to study wild chimpanzees in order to gain insight into the evolutionary19 past of humans.

I like some chimpanzees much better than some humans and some humans much better than some chimpanzees.

In 1960, famed anthropologist Dr. Louis Leaky sent 26-year old Jane Goodall to Tanzania to study wild chimpanzees.

Scientists are seeking to understand the underlying reasons why humans and chimpanzees have key differences

Supposing that the chimpanzees were to be civilized by us,

Such a large catch is rare for Gombe's chimpanzees, which usually target small monkeys, Ruoso said. (See more photos of Gombe chimps. )

Humans did not evolve from chimpanzees

it turns out that humans walking on two legs use only one - quarter of the energy that chimpanzees use while knuckle - walking on four limbs

As a rule chimpanzees move about in one of four types of band: adult males only;

When I suddenly realized the plight of the chimpanzees around the world, both in the wild and in captivity,

Understanding the integration process of captive chimpanzees Pan troglodytes in the Uganda Wildlife Education Centre

Take me to a zoo that's got chimpanzees

Genetic Differences between Humans and Chimpanzees

Like humans, chimpanzees can engage in guerrilla warfare with their neighbours. As with humans, the prize is more land

Why Dogs Smile And Chimpanzees Cry

Learning From Chimpanzees How to Heal Ourselves