Explore "atom": its definition as matter's fundamental unit, ancient Greek etymology ("indivisible"), and diverse real-world examples. Unravel its core meaning and significance.

Explore "matter": its Latin roots defining physical substance and subject. This entry covers meanings (physical stuff, issues, importance), diverse examples, and idioms for this fundamental term.

Discover the science behind the universe. Learn about the history, key concepts, and real-world applications of physics.