Shout 2, Challenge 3: What Does "Endangered" Mean?
How can we tell if a plant species is in danger of becoming extinct? Scientists at the National Museum of Natural History have a quick step-by-step method for predicting the future of the species in their specimen collections.
Visit the Conservation Assessment Project and try out Smithsonian's method for yourself.
Continue to Shout 2, Challenge 4: Get Involved in Conservation »