For many species, time is running out. More than 26,000 species worldwide are threatened with extinction. Today is Endangered Species Day, a day to remember that interaction between animals and their environments is the engine that keeps the planet healthy for all of us. When you remove one species, it affects us all. Find out more at NatGeoPhotoArk.org | National Geographic UK

Fifty years later, the Endangered Species Act continues to enable our mission of illuminating and protecting the wonder of our world. Follow along all month long for daily stories of positive impact. | National Geographic Society