Orangutan population in Sumatra more than doubles after census

There are more than twice as many orangutans on the Indonesian island of Sumatra as we thought, according to a new survey. But deforestation and development could still see their numbers plummet over the next decade.

A team led by Serge Wich, a primatologist at Liverpool John Moores University in the UK, scoured the Sumatran forest and found evidence that there were more than 14,600 apes living there, more than double the previous estimate of 6600. Read more in New Scientist.