Elephants in northern Botswana move long distances, migrating across 5,000 square kilometres, or more during the wetter summer months and communicate over long distances using infrasound inaudible to the human ear. Easier to hear are the low rumbles as you sit in your open vehicle among a gathering herd. As the huge males move closer their slow silent tread belies their awesome power. You don’t know whether to keep taking amazing photos or simply to sit and savour the moment.

These amazing creatures live 60 or 70 years and over that time have six sets of giant molar teeth. All that chewing on branches and consumption of tons of vegetation wears them out, and when elephants die, it’s often just because they’ve worn down their last set of teeth.