Sentences with phrase «young chimpanzees more»

Not exact matches

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.

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.»

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.

While in adult wild chimpanzees it is females that are more avid and competent tool users, in juvenile chimpanzees the researchers conversely found it was the young males that spent more time manipulating objects, seemingly in preparation for adult tool use.

«Young male chimpanzees play more with objects, but do not become better tool users.»

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 chimpanYoung bonobos also had more social partners than young chimpanyoung chimpanzees.