Chimpanzees appear to execute Rational Evidence-Weighing in complex decision-making tasks. The experiments conducted demonstrated that chimps changed their minds when presented with stronger evidence.

The US should be doing much less research on chimpanzees because new, alternative methods yield equally valid results, says a committee of the US Institute of Medicine in a report published this week.

New research on chimpanzees is forcing scientists to rethink where the line between human and animal minds really lies. In carefully designed experiments, chimps are not just grabbing at treats or ...

Amid this controversy, Russian biologist Ilya Ivanov set out in the mid-1920s to crossbreed humans and chimpanzees. Ivanov argued that successfully creating a "humanzee" would demonstrate biological ...

Is this pensive-looking chimp contemplating a new idea? An incredible new study proves the primate has a mind closer to humans than we previously thought. ondrejprosicky - stock.adobe.com See more of ...

In experiment 1, the crystal was placed on a pedestal which had been installed months prior to the experiments, so it did not constitute a novelty for the chimpanzees. (Aden Kahr via SWNS) Yvan's ...

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Source: Ruben van Kuik, via Wikimedia Commons. How do scientists study the evolution of human culture and cognition? There aren’t any early hominins around—but there are chimpanzees, our closest ...

When caretakers tried to retrieve the crystal from the chimps’ enclosure, they had to exchange it for favoured snacks of bananas and yoghurt. A second experiment showed that the chimps could identify ...