内容摘要：But the new analysis using a different dating technique suggests the spears are younger, placing them about 200,000 years old. The new age means the hunting weapons may have been used by Neanderthals instead, according to research published Friday in the journal Science Advances.

But the new analysis using a different dating technique suggests the spears are younger, placing them about 200,000 years old. The new age means the hunting weapons may have been used by Neanderthals instead, according to research published Friday in the journal Science Advances.

“Our ability to produce rhythm — and to use it in our social worlds — that seems to be something that predates humans being human,” said study co-author Cat Hobaiter, a University of St Andrews primatologist.Previous research has shown that chimps have their own signature drumming style. A new analysis of 371 bouts of chimpanzee drumming demonstrates that the chimps “clearly play their instruments -- the tree trunks -- with regular rhythms,” said University of Amsterdam music cognition researcher Henkjan Honing, who was not involved in the study.

When bounding through the jungle, chimps will often grab hold of the tall buttress roots of rainforest trees. Sometimes they pound them several times to create low-frequency sounds that can be heard for a kilometer or more through the forest.Scientists believe that the drumming is a form of long-distance communication, perhaps to alert other chimps where one chimp is waiting or the direction it is traveling.“It’s a way of socially checking in,” said Hobaiter, adding that each chimp has its own “individual signature — a pattern of beats that allows you to recognize who’s producing that drumming.”

In this photo provided by researchers, a wild adult male chimpanzee, the alpha of his community, produces a pant-hoot call early in the morning, as in the background a subadult male, his mother, and younger brother join in with a chorused pant-hoot in the Budongo Forest of Uganda in October 2018. (Adrian Soldati via AP)In this photo provided by researchers, a wild adult male chimpanzee, the alpha of his community, produces a pant-hoot call early in the morning, as in the background a subadult male, his mother, and younger brother join in with a chorused pant-hoot in the Budongo Forest of Uganda in October 2018. (Adrian Soldati via AP)

The new work showed that chimps from different regions of Africa drum with distinctly different rhythms, with western chimps preferring a more even beat while eastern chimps used varied short and long intervals between beats. The research was published Friday in the journal

It’s well-known that chimps use tools such as rocks to crack open nuts and sticks to “fish” termites from their mounds. Tree roots can also be tools, the researchers say.A cormorant gets a running start to take off from the calm waters of Northeast Harbor, Maine, at sunrise Oct. 21, 2024. (AP Photo/Robert F. Bukaty)

A Chinkara gazelle fawn rests in the plumage of a peacock at an animal rescue center on a hot summer day in Bikaner, Rajasthan, India, Thursday, May 23, 2024. (AP Photo/Dinesh Gupta)A Chinkara gazelle fawn rests in the plumage of a peacock at an animal rescue center on a hot summer day in Bikaner, Rajasthan, India, Thursday, May 23, 2024. (AP Photo/Dinesh Gupta)

A wild boar runs through the deep grass in Wehrheim near Frankfurt, Germany, early Tuesday, May 7, 2024. (AP Photo/Michael Probst)A wild boar runs through the deep grass in Wehrheim near Frankfurt, Germany, early Tuesday, May 7, 2024. (AP Photo/Michael Probst)