Around 65 million years ago, something huge may have slammed into the earth. At about the same time the dinosaurs disappeared. Did their disappearance have something to do with a comet or meteor?

Part of a 24-book series that covers the four main branches of science—physical science, life science, earth and space science, and science and technology, and covers essential content standards. Students will build their scientific knowledge, increase their content vocabulary, and sharpen critical nonfiction comprehension skills. Books are 6 5/8" x 9 1/8"