The animals are back. The elephant count in Namibia has risen from under 10,000 around the turn of the millennium to 20,000 today. Lion and leopard populations have doubled since 2004. And cheetahs, once in decline, now speed across the plains here in numbers larger than anywhere else in the world. Which is a big problem. The creatures in Namibia and elsewhere prowl around ever-expanding human settlements, causing trouble, killing livestock, and potentially getting shot. Luckily, there are some high tech (and a few low-tech) ways to keep the animals alive—and out of the way.