Evolution isn't just a thing of the past. It is happening right now, in every species across the world-and our influence on the future of the plants and animals around us is much bigger than we might think. A closer look at the science behind evolution shows how human behaviors like hunting, farming, and urban development have contributed to major physical changes in everything from rhinos to pigs to lizards. And these changes impact us in turn-triggering environmental shifts and contributing to climate change.