science / reference

Provides answers to nearly two thousand questions about topics in science, including physics and chemistry, astronomy and space, the Earth, climate and weather, energy, environment, biology, the human body, animals, plants, health and medicine, general science, math and technology, and minerals, metals, and other materials.

Explains the science behind many machines, gadgets, systems, and processes.

Explores the impact of past innovations on the future, describing scientific achievements from the abacus to the Internet, relating how the invention of the smartphone stems from communication satellites, television, quantum theory, vacuum tubes, radio, radio waves, and electricity, and discussing how scientific innovations and can lead to future milestones in technology.