van Dongen, W. F. D.; White, J.; Brandl, H. B.; Moodley, Y.; Merkling, T.; Leclaire, S.; Blanchard, P.; Danchin, E.; Hatch, S. A.; Wagner, R. H.: Age-related differences in the cloacal microbiota of a wild bird species. BMC Ecology 13, 11 (2013)
Scientists studying a rare population of tool-using chimpanzees have found that aging can have a profound impact on their abilities—but not all chimps decline equally.
