A series of stunning findings about great apes’ mental capabilities in recent years has transformed how we see our closest relatives ...

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.

What would a chimpanzee do if you handed it a glittering quartz crystal? Apparently, the same thing many of us would—hold ...

"The way they ‘studied' it there, turning it over to observe it from different angles, was amazing." ...

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 ...

"We were pleasantly surprised by how strong and seemingly natural the chimpanzees' attraction to crystals was." ...

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And chimps outperform humans. I once watched Matsuzawa show videos of his experiments with Ai and Ayumu at a conference attended by the world’s leading chimp researchers, including Jane Goodall, ...

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 ...

From her studies, Fiona concluded that the relative absence of creepy-crawlies was the biggest reason chimpanzees build nests. When she slept on the bare ground, she found that just after sunset it ...

A recent study performed on chimpanzees demonstrates that chimpanzees possess cognitive flexibility similar to that of humans. When circumstances or evidence change, chimps appear to do the thing ...