Roughly every 15 minutes, somewhere in the world, an animal becomes extinct. You won't hear about it when it happens and you're very unlikely to see it reported on TV. But the extinction clock keeps ticking, 24 hours a day, Every year, more than 30,000 kinds of animal disappear. It's a frightening figure, and it is growing bigger all the time. This book looks at the causes of extinction, and also the reasons for optimism. We can all make a difference!