When it comes to global warming, your day-to-day actionscan make a big difference—if millions of people do it. Find out what you can do to save energy and slow climate change. 

Think your an expert on our changing climate? Test your knowledge with this interactive quiz.

This isn't the first time Earth's climate has changed, but it's the first time human activity has caused it. Learn more about global warming and how — and why — we should slow it. 

Walk, hop, gallop, swim, glide, burrow, and even swing from trees—these are just some of the ways the planet's 5,400 species of mammals move. See how fast, and slow, they can move.

From the extinct Cynognathus and Repenomamus to the plant-eating dugongs and manatees, explore some of Earth's most unusual mammals. 

From the extinct Cynognathus and Repenomamus to the plant-eating dugongs and manatees, explore some of Earth's most unusual mammals. 

From "What does a paleontologist do?" to "What's your favorite ice cream flavor?", find out how paleontologist John Flynn answered kids' questions.

What would it be like to bite like a saber-toothed cat? Or to gnaw like a beaver? Explore other mammals' teeth with this matching game and coloring book! 

How do how gazelles jump straight up into the air from a standstill? And why do dolphins swim differently than fish? Create six fun flipbooks to explore how mammals move!

From a journey through the basics of evolution to a look at mammal detectives to a re-creation of the world of prehistoric predators, these kid-friendly book and DVD titles bring to life the world of extreme mammals.