Katharina M. Fromm relates how barium and its ores went from a magical, glowing species that attracted witches and alchemists to components in a variety of compounds that are key parts of modern life.

Barium qubits are controlled primarily with visible light—rather than ultraviolet light—allowing IonQ to build its future quantum computers with standard silicon photonics technology.

Barium is used to produce the green colour in firecrackers. It also acts as a stabilising agent for the products’ long shelf-life Mumbai : Ahead of Diwali, city-based non-governmental ...