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...sand grains and glass) projecting from the edges of their leaves, which make the grass gritty and wear down the teeth of animals that eat it [p. 122]. As I mentioned earlier, the molar teeth of elephants are constantly replaced as they are worn down by chewing the food. For the same reason, horses have very long teeth, which emerge slowly, remaining about the same size as...

...sand about what’s really going on-ness, what would really have happened? What would have been the effect, for example, on the human race if the natural history unit at the BBC had never existed and never made any of those programmes? We will never know, but it’s an interesting question to ask. That’s not to get natural history filmmakers and particularly...