Scientists know surprisingly little about sloths, but Becky Cliffe is working to change that. Visit the steamy jungles of Central and South America to see these adorable animals up close--and find out ways to protect them.

Introduction: Meet Dr. Sloth -- A young scientist -- Meet the sloths -- Sloth basics -- Early days with sloths -- Sloth backpacks -- Poo dances and digestion -- Sloth DNA -- Sloth fur surprises -- Sloth bridges -- Connecting gardens -- To the rescue! -- School visits -- Conclusion: How can you help the sloths?