Secrets of early human ancestors could be unlocked by African rainforests

Think of rainforests and the picture is inevitably one of a dark and forbidding realm where life is abundant, yet alarmingly cryptic. Rather than the sense of space offered by long, iconic grassland vistas, distance is compressed into tangled webs of foliage, veiling both predators and prey. Diffuse and difficult to access proteins, carbohydrates and fats increase the chances of encountering an array of lurking dangers. For these reasons, it has long been thought that humans were only able to colonise rainforests in the last few thousand years, after the development of agriculture.

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