Science & Discovery Timelines
Free printable science and discovery timelines for kids — the history of astronomy, dinosaurs and prehistoric life, and more. Each prints on Letter paper with a blank fill-in version and quiz.
History of Electricity Timeline
The history of electricity is the story of how humans went from kite-flying in thunderstorms to lighting cities, building power grids, and inventing the transistor — the tiny device that makes every computer and smartphone possible.
Evolution & Natural Selection Timeline
The theory of evolution by natural selection — developed by Charles Darwin in the 19th century and confirmed at the molecular level in the 20th — is the central organizing theory of all biology, explaining how all living things are related and how species change over time.
History of Astronomy Timeline
The history of astronomy is the story of how humans figured out what the universe actually is — from ancient Greeks who proposed the Earth moves around the Sun, to telescopes that see to the edge of time itself.
Dinosaurs Timeline
Dinosaurs ruled the Earth for over 165 million years — rising after a mass extinction, dominating every ecosystem on every continent, and disappearing in a sudden catastrophe that gave rise to the mammals, and eventually, to us.
Germ Theory & Vaccines Timeline
Germ theory — the discovery that invisible microorganisms cause infectious disease — is one of medicine's most life-saving ideas, transforming surgery, public health, and disease prevention in less than a century.
Computing & Internet History Timeline
The history of computing is the story of how humans went from filling entire rooms with calculating machines to putting a more powerful computer in every pocket — transforming every aspect of work, communication, science, and daily life in under a century.