A pygmy shrew is small—it's among the littlest mammals! A ladybug is even smaller, but it hardly seems tiny when you compare it to a protozoa! And there are m

Using fun facts and creative comparisons, science author Robert E. Wells answers some of humankind's biggest questions about the world we live in. This collecti

It's hard to imagine—the molecules in the glass of water you just finished might have once been part of a water hole that dinosaurs drank from! In this fascin

Bengal tigers are an endangered species due to many human-caused factors, such as poaching, habitat destruction, and global warming. In Robert Wells's signature

Offers step-by-step instructions for a hands-on learning experience for children in grades 2-5 who are doing science fair projects.