Like humans, chimpanzees have a range of “cultural differences” from place to place. Something that means “let’s rest” to one group of chimps may mean “let’s play” to another. But new research has found that chimpanzees are suffering so much from human hunting and deforestation that their cultural differences are being erased. Alexander Piel and colleagues explain why this matters.

Recent photographs of a black leopard in Kenya made headlines across the world. Most black leopards can be found in Asia, though there isn’t a reliable figure of how many there are in the world and little is known about them. Sam Williams spoke to Nicholas Pilfold a Kenya-based biologist who has been researching the cats and the threats they face.