Sentences with phrase «young chimpanzees»

The researchers say that the apparent similarity between human children and young chimpanzees in the observed male bias in object manipulation, and manipulation during play in particular, may suggest that object play functions as motor skill practice for male - specific behaviours such as dominance displays, which sometimes involve the aimed throwing of objects, rather than purely to develop tool use skills.

A professor of psychology and neuroscience at the University of Maryland, he has been engaged for more than a decade in a wide - ranging intellectual pursuit that has taken him from the play of young chimpanzees to the history of American sitcoms — all in search of a scientific understanding of that most unscientific of human customs: laughter.

Among young chimpanzees who have been taught sign language, tickling is a frequent topic of conversation.

Scientists overturn the long - held belief that young chimpanzees wean once their back teeth start coming in.

Dr Biro added: «The finding that young chimpanzees more readily took cues from their mothers when looking to take their turns reveals interesting parallels with other aspects of information transmission in chimpanzee societies.

However, in the second study, led by Felix Warneken, also at the Max Planck Institute, three young chimpanzees helped their human minder reach for objects even without any hope of reward — just like human children as young as 18 months old.

«As young chimpanzees get older they switch to manipulating predominantly sticks, which in this community is the tool type used by adults to harvest army ants,» Koops explained.

Up until now all attempts have failed, but when Will takes home young chimpanzee Caesar, he finds the ape displaying an aptitude that's all too human.

The tale of Caesar — a bright young chimpanzee subjected to freewheeling medical experimentation, who grows up to become an ape - separatist revolutionary — was packaged in a bland Hollywood wrapper, as a love story between a lab scientist and his assistant (played by James Franco and then - it girl Freida Pinto, respectively).

I just finished a wonderful novel in which one sub-plot was about psychological studies that paired human children with young chimpanzees to compare differences in developmental stages for cognitive and physical tasks.

Smith had two nature photographers follow five young chimpanzees at a field site in Uganda's Kibale National Park for nearly a year and a half.

Charles Darwin, in The Expression of the Emotions in Man and Animals, noted that «if a young chimpanzee be tickled — the armpits are particularly sensitive to tickling, as in the case of our children — a more decided chuckling or laughing sound is uttered; though the laughter is sometimes noiseless.»

Indeed, the young chimpanzees actually showed an unexpected uptick in nursing behavior after their grinders appeared.

A few smiles, yawns and grimaces into the camera were all it took for Tanya Smith to shatter one of the longest - held truisms in primate studies — that a young chimpanzee's molar development can be used as a proxy for developmental milestones such as age of nursing and weaning.

Soon all of the young chimpanzees in the colony were walking the same way in single file behind the unlucky male.

Females with low rank are known to experience more social stress in large groups, and there is always a risk of infanticide against the young chimpanzees.

The young chimpanzees made fewer errors and were quicker to respond than their mothers — however, during control tests involving each chimpanzee working individually with a computer program, the mothers were faster, suggesting that young chimpanzees are better at paying attention to their mothers than vice versa.

It may not come as a surprise, but mother chimpanzees seem to be important for the development of social skills in young chimpanzees.

«We suggest that the observed male bias in young chimpanzees may reflect motor skill practice for male - specific behaviours, such as dominance displays, rather than for tool use skills.

«We found that young chimpanzees showed higher rates and, importantly, more diverse types of object manipulation than bonobos.

Chimpanzees, however, are the most diverse tool - users among non-human primates, and the researchers found high rates of a wide range of object manipulation among the young chimpanzees they studied.

In fact, young bonobos spent more time with their mothers, and had more individuals in close proximity for more time whilst feeding than young chimpanzees.

Young bonobos also had more social partners than young chimpanzees.

But young chimpanzees, which can learn language, use tools and perhaps even mourn their dead, depend on their mothers for nearly four years.