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Current Chimpanzees News and Events, Chimpanzees News Articles.
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First primate archaeological dig uncovers new tool development links
A study of chimpanzees' use of hammers to open nuts in western Africa may provide fresh clues to how tools developed among human ancestors. (2002-05-23)

Chimpanzee stone tool site excavated
West African chimpanzees use stones and branches as hammers to crack open different types of nuts. Some of these hammers are very heavy, and chimpanzees have been observed using them for up to 2 hours per day during the 4 months that the nut season lasts. The first archaeological excavation of a chimpanzee nut-cracking site was carried out in September 2001. The results of these investigations are presented in the 24th May issue of Science. (2002-05-23)

Archaeological journey reveals new information on chimpanzee stone tool technology
Using archaeological methods on a non-human species for the first time, an excavation of a chimpanzee stone tool site revealed new facets and confirmed others of chimpanzee behavior. In addition to the possibility of tracing ape culture back in time, the research could also open up new ways of interpreting some early hominid, or human, sites. (2002-05-23)

Origin of bipedalism seems most closely tied to environmental changes
During the past 100 years, scientists have debated many hypotheses about the evolutionary route to bipedalism. Now, after an extensive study of evolutionary, anatomical and fossil evidence, a team of paleoanthropologists has narrowed down the number of tenable hypotheses to explain bipedalism and our prehuman ancestors' method of navigating their world before they began walking upright. (2002-04-30)

UMass anthropologist investigates dental development and body size in primates
University of Massachusetts anthropologist Laurie R. Godfrey is a member of a team of researchers that finds a number of species of living and recently extinct lemurs living on Madagascar share very accelerated development of their teeth and can chew leaves and other hard-to-process foods soon after birth. (2002-04-30)

Study highlights need for hepatitis C vaccine
A US study in this week's issue of THE LANCET highlights a high rate of hepatitis C virus (HCV) infection among injection-drug users, and that immunity against persistent HCV infection can be acquired. The authors suggest that vaccines should be tested to reduce the burden of liver disease associated with HCV infection. (2002-04-24)

Researchers uncover brain patterns that differentiate humans from chimpanzees
A team of international scientists from Germany, the Netherlands and San Diego, California, may have shed light on why chimps and humans are so genetically similiar (nearly 99 percent of shared DNA sequences), and yet so mentally different. (2002-04-11)

Understanding our ape 'cousins:' chimpanzee genetics may shed light on human diseases
The human brain shows strikingly different patterns of gene expression compared to the chimpanzee brain, a difference that isn't seen in other parts of the body like the liver and white blood cells, an international research team reports. (2002-04-11)

Discovery Channel special watches OSU chimps learn to read
After a little more than three years' effort, psychologists at Ohio State University have taught a pair of young chimpanzees to (2002-04-10)

Scientists look to Europe as evolutionary seat
University of Toronto anthropologist David Begun and his European colleagues are re-writing the book on the history of great apes and humans, arguing that most of their evolutionary development took place in Eurasia, not Africa. (2002-02-18)

Remains of seven types of edible nuts and nutcrackers found at 780,000-year-old archaeological site
The remains of seven types of 780,000-year-old nuts have been found at the Gesher Benot Ya'aqov site in Israel's Hula Valley. The nuts and the stone tools found with them are the first evidence that nuts formed a major part of man's diet and that prehistoric men had developed an assortment of tools to crack open nuts during the Early-Middle Pleistocene Period, according to researchers from the Hebrew University of Jerusalem and Bar-Ilan University. (2002-02-18)

HIV-like virus detected in wild chimpanzee
An international team of researchers has identified a wild chimpanzee infected with simian immunodeficiency virus (SIVcpz). The identification of the infected animal strengthens the scientific case that wild chimpanzees are the reservoir of SIVcpz, which researchers believe is a relative of the human immunodeficiency virus (HIV). (2002-01-17)

Scientists work to prevent recent Ebola outbreak from decimating gorillas and chimps
The Bronx Zoo-based Wildlife Conservation Society (WCS) is working to prevent the recent Ebola virus outbreak from decimating wild populations of gorillas, chimpanzees and other wildlife in Gabon and neighboring Congo. (2001-12-13)

Homosexual behavior discovered among wild orangutans
A researcher from the Bronx Zoo-based Wildlife Conservation Society (WCS) has observed homosexual behavior among orangutans in Sumatra, marking the first time scientists have witnessed this activity among wild populations of these critically endangered great apes. The researcher, Dr. ElizaBeth Fox, who has studied orangutans since 1994, published her observations in last month's American Journal of Primatology. (2001-12-06)

Earliest human ancestors discovered in Ethiopia
Anthropologists have discovered the remains of the earliest known human ancestor in Ethiopia, dating to between 5.2 and 5.8 million years ago and which predate the previously oldest-known fossils by almost a million years. The previous discovery of the 4.4-million-year-old Ardipithecus ramidus was up to this point the oldest known hominid, the primate zoological family that includes all species on the human side of the evolutionary split with chimpanzees. (2001-07-11)

Progressor chimpanzees could reveal mechanism for resisting AIDS
Three HIV-positive chimpanzees that are progressing to AIDS could provide insight into how the disease develops and might be averted, according to research conducted at the Yerkes Regional Primate Research Center of Emory University and published in the October issue (Vol. 182, No. 4) of The Journal of Infectious Diseases. (2000-09-12)

We are family: the imperative for a chimpanzee genome project
With chimps 99% genetically identical to humans, you might wonder if the difference between man and ape is all in the head. But chimpanzees are strikingly different from humans in their resistance to devastating diseases, such as AIDS and malaria. Ajit Varki (UCSD) makes an urgent case to launch a Chimpanzee Genome Project, in a commentary published this month in Genome Research. (2000-08-20)

Mutation rate of male sex chromosome lower than expected
Genetic sequencing and analysis of regions of the X and Y chromosomes of humans, chimpanzees and gorillas, reveals a much smaller difference in mutation rates of the two sex- determining chromosome, say HHMI researchers. The results of the study cast doubt on the idea that sperm production is inherently more prone to error than egg production. (2000-08-09)

Gabon ends logging in key wildlife area
In a unique agreement with logging companies and conservation organizations, the Government of Gabon has agreed to end logging in the 1,900-square-mile Lopé Reserve, home to the highest density of large mammals ever recorded in a rainforest, the Bronx Zoo-based Wildlife Conservation Society (WCS) announced today. (2000-07-24)

Images of evolution
For new clues on evolution, DNA leaves fossils in the dust. Researchers from the Institut Curie in Paris are using new methods of species comparison to track the history of human chromosomes over a 130 million-year period of mammalian evolution, as reported in this month's issue of Genome Research. (2000-05-14)

Brookfield Zoo hosts international ape conference
Brookfield Zoo is hosting an international conference May 10- 13, 2000, that will define the obstacles facing apes in this century. The Apes: Challenges for the 21st Century is the first conference to address issues affecting gorillas, orangutans, chimpanzees, bonobos, gibbons, and siamangs both in the wild and in zoos. The meeting brings together the world's leading researchers, zoological park personnel, and field biologist. (2000-05-03)

Primates may have triggered the hepatitis pandemic
British scientists suggest that hepatitis B, the virus carried by 5 per cent of the world's population, probably spread to people from apes or monkeys .Researchers have found powerful evidence of naturally occurring animal epidemics that could be the source of many human infections. (2000-05-02)

Chimpanzee subspecies are genetically mixed and more diverse than humans, according to research in 5 November 1999 Science
A new study suggests that chimpanzee subspecies may be more genetically variable than humans and also more closely related to each other. The study's results impact on a number of hot topics in evolutionary anthropology, including the origin of modern humans, great ape conservation, and chimpanzee culture. (1999-11-03)

Yerkes researchers find primate face recognition can be purely visual
According to a report by researchers at Yerkes Regional Primate Center of Emory University in the June 17 issue of Nature, chimpanzees can easily recognize faces of their brethren presented in digitized photographs. This ability to discriminate one group-mate from another has helped chimpanzees evolve to form the most complex of all mammal societies, characterized by individualized relationships, cooperative networks, and stable hierarchies of power. (1999-06-16)

NIAID-Supported Scientists Discover Origin Of HIV-1
NIAID-supported scientists report that they have discovered the origin of HIV-1, the virus responsible for the global AIDS pandemic. A subspecies of chimpanzees native to west equatorial Africa has been identified as the original source of the virus. (1999-01-31)

Resolving Conflicts -- What We Can Learn From The Apes
Research in chimpanzees by Frans de Waal at Yerkes Primate Research Center shows that conflict and conflict resolution are integrated parts of social relationships, determined by social factors and modifiable by the social environment. (1999-01-24)

Human Ancestors Went Out Of Africa And Then Came Back: NYU/SUNY-Albany Research Team Proposes Controversial New Model for Evolution of Humans
SUNY-Albany biologist Caro-Beth Stewart and NYU anthropologist Todd R. Disotell have proposed a controversial new model for the evolution of apes and humans, which together are called the hominoids. Stewart and Disotell argue that the ancestor of humans and the living African apes evolved in Eurasia, not Africa. (1998-08-04)

Earlier Human Speech?
Duke University Medical Center anthropologists have offered anatomical evidence from skulls suggesting that human vocal abilities may have appeared much earlier in time than is suggested by the first archaeological evidence for speech. (1998-04-27)

Purdue Finding May Snuff Out The Sniffles
Purdue University scientists have unlocked the secrets of a receptor that the common cold virus uses as an entryway to infect human cells. The findings, detailed in the April 14 issue of PNAS, may help slam the door on one of the most troublesome pathogens known to man. (1998-04-14)

Similarities Found In Human, Chimp Brains; Columbia, Mount Sinai, NIH Scientists Find Region That Controls Language Identical In Both Species
Neuroscientists have found that a region of the brain thought to control language is proportionately the same size in humans and chimpanzees, disproving a theory that the brain section was enlarged only in humans. The finding supports the hypothesis that chimps may have more complex communication skills than previously thought. (1998-01-08)

One Chimp Can Perceive States Of Awareness In Others
Researchers discovered that chimpanzees may determine whether their partners know they are in, suggesting that chimps decide how ignorant or informed their peers are about an unexpected situation. This suggests that have the ability to perceive the knowledge state of a peer, and perhaps the intention to protect that peer. (1997-08-29)

Scientists Create Hepatitis Infection
Scientists have infected animals with hepatitis C by inoculating them with copies of the virus's genetic material. The study, reported in the July 25 issue of Science, proves for the first time that hepatitis C virus alone is sufficient to cause the disease and should aid in understanding this medically important virus. (1997-07-24)

DNA Shows Neandertals Were Not Our Ancestors
A team of U.S. and German researchers has extracted mitochondrial DNA from Neandertal bone showing that the Neandertal DNA sequence falls outside the normal variation of modern humans. (1997-07-10)

Chimpanzees Protected From HIV-1 Infection By New DNA Vaccine
Using an innovative DNA-based vaccine, a research team led by University of Pennsylvania Medical Center scientists has successfully protected chimpanzees against massive doses of HIV-1, the virus that causes AIDS. The vaccine's effectiveness is unprecedented in a primate species that, like humans, is susceptible to HIV-1 infection (1997-04-30)

Sense Of "Self" And Ability To Play May Depend More On Social Background, According To New Study With Chimpanzees
A sense of self and the enjoyment of play may have more to do with rearing history than was previously thought, according to a new study by a graduate student at the University of Georgia (1997-04-07)

Clear-Cutting In Central Africa
The U.S. must play a key role in saving central Africa's tropical forests, now in sudden peril due to an unprecedented land rush by high-volume logging companies, according to Michael Fay, a conservation biologist with the Wildlife Conservation Society (WCS) headquartered at the Bronx Zoo. (1997-03-21)

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