Explains in simple text and illustrations what is known about the force of gravity.

"Part scientific explanation, part biography, this nonfiction picture book explores the life of the fabled apple tree that inspired Newton's theory of Gravity-from a minor seed to a monumental icon that has inspired the world's greatest minds for over three and a half centuries"--

"The astonishing science of black holes and their role in understanding the history and future of our universe. Black holes are the most extreme objects in the universe, and yet they are ubiquitous. Every massive star leaves behind a black hole when it dies, and every galaxy harbors a supermassive black hole at its center. Frighteningly enigmatic, these dark giants continue to astound even the scientists who spend their careers studying them. Which...