How to Clone a Mammoth

Shapiro’s title is a bait-and-switch. She immediately makes clear in big block letters: "WE CAN’T CLONE A MAMMOTH!" It’s impossible. So what is she doing? Well, we can genetically rejigger Asian elephants to resemble woolly mammoths, and that could be useful. Erzats mammoths might help restore the Siberian tundra, and bioengineered, cold-adapted elephants could expand their range north, which would help them survive climate change. Shapiro has little patience for romantic visions of restoring extinct species, but she makes a compelling—and reassuring—case for how we can use bioengineering to save endangered species while they still exist.