Africa's spiny trees offer lessons in understanding the earth's ecology: Spines don’t stop animals from browsing, but slow down their feeding rates. Gareth HempsonThe Serengeti; Chobe; Kruger; the Masai Mara: in many people’s minds, savannas are Africa. This hasn’t always been true, though. About 30 million years ago, the continent was largely covered by forests. So how did … [Read more...] about Africa’s spiny trees offer lessons in understanding the earth’s ecology | The Conversation