WHY HEALTHY DEER MATTER AND HOW YOU CAN HELP: Over the last 100 years, Missouri's white-tailed deer were brought back from an all-time low of 400 to more than 1.2 million today. They're one of our most valuable species for outdoor recreation, jobs and tourism. The work of keeping our deer herd healthy today is as important as the early work to restore them. Scientists work with hunters and landowners to prevent the spread of disease, especially Chronic Wasting Disease (CWD), which is always fatal. Learn more about deer health, CWD, and mandatory testing in this week's Discover Nature Note.