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--
Decades before Darwin famously publishes his theories of evolution, Mary Anning digs, hammers, and hauls ... exposing fossils that have been hidden in the rocks for millions of years. --flyleaf.