Domain Explorer
Explore history through ten thematic lenses.
Science & Discovery
Breakthroughs in understanding the natural world, from heliocentrism to quantum mechanics.
Copernicus Publishes Heliocentric Theory
Nicolaus Copernicus published De Revolutionibus Orbium Coelestium, proposing that Earth and the other planets revolve around the Sun. This revolutionary work challenged over a millennium of geocentric dogma and ignited the Scientific Revolution.
Gregorian Calendar Adopted
Pope Gregory XIII introduced the Gregorian calendar to correct the drift of the Julian calendar. This reform, which dropped ten days from October 1582, was gradually adopted worldwide and remains the international civil calendar today.
Galileo Observes Jupiter's Moons
Galileo Galilei improved the telescope and turned it toward the heavens, discovering four moons orbiting Jupiter. This provided decisive evidence for the Copernican heliocentric model.
Galileo Publishes Starry Messenger
Galileo published Sidereus Nuncius, announcing his telescopic discoveries including lunar mountains, Jupiter's moons, and countless stars invisible to the naked eye.
Royal Society of London Founded
The Royal Society of London was formally chartered, becoming the world's oldest continuously operating scientific academy. It fostered the sharing of discoveries and established peer-review.
Great Fire of London & Newton's Annus Mirabilis
The Great Fire of London destroyed 13,200 houses and 87 churches. That same year, Isaac Newton made groundbreaking discoveries in calculus, optics, and gravitation in his miraculous year.
Newton Publishes Principia Mathematica
Isaac Newton published Philosophiae Naturalis Principia Mathematica, perhaps the most important scientific work ever written. It established the laws of motion and universal gravitation.
Linnaeus Creates Botanical Classification
Carl Linnaeus published Systema Naturae, introducing the binomial nomenclature system for classifying organisms. His system is still the foundation of biological taxonomy worldwide.
Franklin's Lightning Rod Experiment
Benjamin Franklin flew a kite in a thunderstorm, proving that lightning is electrical. His invention of the lightning rod saved countless buildings and lives.
Uranus Discovered by Herschel
William Herschel discovered Uranus, the first planet found using a telescope and the first discovered in modern history. This doubled the known size of the solar system.
Darwin Publishes On the Origin of Species
Charles Darwin presented his theory of evolution by natural selection. This revolutionary work fundamentally transformed biology and reshaped humanity's understanding of its place in nature.
X-Rays Discovered — Cinema Invented
Wilhelm Röntgen discovered X-rays, revolutionizing medicine. That same year, the Lumière brothers held the first public film screening in Paris, giving birth to cinema.
Marie Curie Discovers Radium
Marie Curie discovered polonium and radium. She became the first woman to win a Nobel Prize, and eventually the only person to win Nobels in two different sciences.
First Nobel Prizes Awarded
The first Nobel Prizes were awarded in Stockholm and Oslo, fulfilling Alfred Nobel's will. They became the world's most prestigious honors in science, literature, and peace.
Einstein's Special Theory of Relativity
Albert Einstein published four revolutionary papers in his 'miracle year,' including special relativity and E=mc². These works redefined space, time, and energy.
DNA Double Helix Discovered
Watson and Crick, building on Rosalind Franklin's data, determined DNA's double-helix structure. This discovery unlocked the secret of life itself.
Dolly the Sheep Cloned — Hong Kong Returned
Scientists cloned Dolly the sheep, the first mammal cloned from an adult cell. The UK returned Hong Kong to China after 156 years of colonial rule.
Higgs Boson Particle Discovered
Scientists at CERN discovered the Higgs boson, confirming a 48-year-old prediction and completing the Standard Model of particle physics.