This series unpacks the basic--but also very complex--fundamentals of physics and the universe. Each volume looks at the beginnings of discovery and casts a spotlight on the history behind a central topic in physics: quantum mechanics, gravity, relativity, and dark matter. Many ingenious scientists contributed to these breakthroughs, improving upon one another's experiments and hypotheses to develop new theories. Concepts are described in an easily comprehensible and engaging manner and are supplemented by color photographs and helpful diagrams. - Domain-specific vocabulary words are used in a scientific context to help students understand their meaning and accelerate comprehension - Science and technology informational text that challenges students to analyze the interactions between individuals, events, and ideas - Promotes pursuit of STEM careers in the field of science and technology - Straightforward, appealing narrative gives historical context to complex ideas - Additional experiments and recent research developments are featured in sidebars