A new study in the Proceedings of the Royal Society B finds that forests which have undergone logging in the past, sometimes even twice, retain significant levels of biodiversity in Borneo. The researchers say these findings should push conservationists to protect more logged forests from being converted into oil palm plantations where biodiversity levels drop considerably and endangered species are almost wholly absent. Given that much of Borneo's forests have been logged as least once, these long-dismissed forests could become a new frontier for conservationists.