Paleocene-Eocene Thermal Maximum: Earth's Ancient Global Warming
A rapid release of thousands of billions of tonnes of carbon warmed the planet, acidified the oceans and reshaped marine and land life.
Every Chronicle article on world history, newest first: battles, empires, disasters, discoveries and revolutions.
A rapid release of thousands of billions of tonnes of carbon warmed the planet, acidified the oceans and reshaped marine and land life.
Debris from a collision between the proto-Earth and a planet-sized body gathered in orbit to form the Moon, which has accompanied Earth ever since.
Failed harvests caused the last great subsistence crisis in the Western world, with food riots, disease, mass emigration and lasting cultural echoes.
The Allies defeated the U-boat campaign, keeping Britain supplied and making possible the build-up for the invasion of Europe.
An unofficial, local ceasefire along much of the British-held front; fighting resumed afterwards and high commands prevented any repeat on the same scale.
East India Company victory; by the Treaty of Sugauli Nepal lost about a third of its territory and accepted a British Resident in Kathmandu.
Spanish rule in New Spain ended with the Plan of Iguala and the Treaty of Córdoba, and the Mexican Empire was proclaimed independent in September 1821.
The punched-card Jacquard mechanism let one weaver produce elaborate patterned fabric and became a key forerunner of programmable machines.
Catholic worship was restored in France, with bishops nominated by the state, clergy paid by the state, and the Church's lost lands left in the hands of their new owners.
Chichen Itza became the dominant city of the northern Maya lowlands before declining, while remaining a major pilgrimage site.
A non-aggression and exchange agreement under which Makuria sent enslaved people north and received goods from Egypt, preserving Nubian independence for about 600 years.
The Pallavas created one of the earliest groups of stone temples in southern India, setting patterns for later Dravidian temple architecture.