Describes the U.S. flag's history and the meanings of its symbols, lists rules about the care and treatment of the flag, and discusses the Pledge of Allegiance.
Provides information about black holes, explaining how stars become black holes, looking at the types of black holds, and discussing what is inside a black hole and how scientists study them.
Explores details of the travels of Meriwether Lewis and William Clark in their exploration of the American West, covering topics such as their encounters with Native American tribes, documentation of a wide variety of plants and animals, and arrival at the Pacific Ocean, with illustrations, a timeline, and statistics.
An illustrated introduction to meteor showers that explains the differences between a meteor and shooting star, how meteors travel through the Earth's atmosphere, and related topics.
Photographs and easy-to-follow text provide a brief overview of the United Arab Emirates--Abu Dhabi, Ajman, Dubai, Fujairah, Ras al-Khaimah, Sharjah, and Umm al-Quwain--covering history, culture, economy, and more.
Explains the science behind how the sense of smell and how the nose works, discusses the link between the brain and the sense of smell, examines the job of a professional sniffer, looks at the effects of aromas on moods, and answers the question of whether a nose can get tired.
Explains the science behind how sight occurs, discusses the links between light, sight, and the brain, examines the phenomena of optical illusions, looks at some of the things that can go wrong with vision, and examines ways to protect the eyes.
