Dinosaurs With Feathers: The Ancestors of Modern Birds (Originally published by Clarion, 2001)
Recent fossil discoveries of dinosaurs with feathers add to a growing body of evidence that one branch of the dinosaur family tree developed into birds. Learn about the latest scientific discoveries and what they tell us about the ancestry of birds.
When Mammoths Walked the Earth (Originally published by Clarion,2002)
During the Ice Age, woolly mammoths roamed the frozen lands to the north, while the huge Colombian mammoths lived in warmer parts of North America. Find out how scientists are learning more about these extinct relatives of elephants from fossil remains found in places ranging from sinkholes and tar pits to frozen tundra and the bottom of the sea.