Exploration
Events · 53
- c. 130 BCEThe Silk Road
The Opening of the Silk Road
The Chinese Han emperor sent an envoy, Zhang Qian, west to seek allies against nomadic enemies. He returned after years of travel and captivity with reports of rich and unknown civilizations far to the west. His journeys opened regular contact and trade between China and Central Asia, giving birth to the network of routes later called the Silk Road.
Reputable source - 1st century CEThe Silk Road
Silk: China's Great Secret
Silk, produced from the cocoons of silkworms, was China's most prized export and a jealously guarded state secret. Light, beautiful, and immensely valuable, it traveled the length of the trade routes and reached the Roman Empire, where the wealthy paid fortunes for it — to the alarm of Roman moralists who decried the drain of gold to the East.
Reputable source - 1st–6th centuries CEThe Silk Road
The Spread of Buddhism
The Silk Road carried not just goods but ideas and faiths. Buddhist monks and merchants traveled the routes from India into Central Asia and China, and along the way built monasteries and carved vast cave temples, such as those at Dunhuang, filled with painted scriptures and statues.
Reputable source - 6th–9th centuries CEThe Silk Road
Merchants and the Cities of the Road
The Silk Road was not a single highway but a web of caravan routes threading between great oasis cities — Samarkand, Bukhara, Kashgar, Dunhuang — where traders of many peoples, especially the Sogdians of Central Asia, met to exchange goods. Camel caravans crossed deserts and mountains carrying silk, spices, jade, glass, and horses.
Reputable source - 7th–9th centuries CEThe Silk Road
The Tang Dynasty Golden Age
Under China's Tang dynasty, the Silk Road reached a golden age. The Tang capital of Chang'an, at the road's eastern end, grew into perhaps the largest and most cosmopolitan city on earth — a metropolis of a million people where Persian, Sogdian, Arab, and Indian merchants, monks, and musicians mingled, and foreign faiths and fashions flourished.
Reputable source - 8th century CE onwardThe Silk Road
The Exchange of Ideas and Invention
Along with goods, the Silk Road carried technologies that changed the world. Chinese inventions — above all paper, and later gunpowder and the compass — spread west, while crops, artistic styles, and scientific knowledge flowed in every direction. Paper-making reached the Islamic world after the Battle of Talas in 751 and eventually transformed Europe.
Reputable source · 2 sources - 13th–14th centuriesThe Silk Road
The Pax Mongolica
When the Mongol Empire conquered most of Eurasia in the 13th century, it united the Silk Road under a single authority for the first time. The resulting 'Mongol Peace' made travel across the continent safer than ever, and trade, travelers, and ideas flowed freely from China to the Mediterranean.
Reputable source - 1271–1295The Silk Road
Marco Polo
The Venetian merchant Marco Polo journeyed the length of the Silk Road to the court of Kublai Khan in China, where he lived for years before returning home. His account of the wonders of the East — its cities, wealth, and marvels — became one of the most influential travel books ever written.
Reputable source - 1325–1354The Silk Road
Ibn Battuta, the Great Traveler
The Moroccan scholar Ibn Battuta spent nearly thirty years journeying across the connected world of the 14th century, covering perhaps 120,000 kilometers — through North Africa, Arabia, Persia, India, and, by his account, China. His travel book, the Rihla, is a vivid record of the vast, interlinked Afro-Eurasian world at its medieval height.
Reputable source - 1340sThe Silk Road
The Black Death Travels the Road
The same routes that carried silk and ideas also carried disease. In the 14th century, bubonic plague spread out of Central Asia along the trade routes, reaching the Black Sea and then Europe, where it became the Black Death — the deadliest pandemic in recorded history.
Reputable source - 1419–1460The Age of Exploration
Prince Henry and the Portuguese Voyages
From about 1419 the Portuguese prince Henry, later called 'the Navigator,' sponsored a sustained program of exploration down the west coast of Africa. Gathering experts in navigation, cartography, astronomy, and shipbuilding — and using the nimble new caravel — his captains pushed ever further south in search of gold, trade, and a route around Africa.
Reputable source - 15th centuryThe Silk Road
The End of the Silk Road
The overland Silk Road declined as the Mongol Empire fragmented, as the plague disrupted trade, and above all as Europeans began to open sea routes to Asia. Cheaper and safer than the long caravan journey, the ocean-going ships of the age of exploration gradually replaced the ancient overland roads.
Reputable source Dias Rounds the Cape of Good Hope
In 1488 the Portuguese captain Bartolomeu Dias became the first European to sail around the southern tip of Africa, later named the Cape of Good Hope. His voyage proved that a sea trading route from Europe to the riches of Asia was possible.
Reputable sourceColumbus Reaches the Americas
Sailing west for Spain in search of a route to Asia, Christopher Columbus instead made landfall on 12 October 1492 in the Bahamas, where he encountered the Taíno people. Believing he had reached the Indies, he explored the Caribbean and returned to Spain to announce his 'discovery.'
Primary sourceThe Treaty of Tordesillas
With Spain and Portugal both claiming newly reached lands, in 1494 the two crowns signed the Treaty of Tordesillas, drawing an imaginary line down the Atlantic Ocean. Everything to the west of it would fall to Spain, everything to the east to Portugal.
Reputable sourceVasco da Gama Reaches India
Following Dias's route around Africa, in 1498 the Portuguese captain Vasco da Gama sailed on across the Indian Ocean and landed at Calicut (Kozhikode) on the coast of India — the first European to reach India by sea.
Reputable sourceCabral Reaches Brazil
In 1500, leading a large fleet bound for India, the Portuguese commander Pedro Álvares Cabral swung far to the west and made landfall on the coast of Brazil, claiming it for Portugal before continuing on to Asia.
Reputable source- 1519–1521The Age of Exploration
Cortés and the Fall of the Aztec Empire
Landing in Mexico in 1519, the Spanish conquistador Hernán Cortés marched on the Aztec capital, Tenochtitlan. Exploiting local resentment of Aztec rule to raise thousands of Indigenous allies, and aided by a devastating smallpox epidemic, he besieged and destroyed the city in 1521.
Reputable source - 1532–1533The Age of Exploration
Pizarro and the Fall of the Inca Empire
In 1532 Francisco Pizarro reached the Inca Empire, the largest state in the Americas, just as it was reeling from a civil war and from European disease. With a tiny force he seized and later executed the Inca ruler Atahualpa, then captured the capital, Cusco.
Reputable source Jacques Cartier and New France
In 1534 the French navigator Jacques Cartier crossed the Atlantic and explored the Gulf of St Lawrence, and on later voyages sailed up the St Lawrence River deep into North America, claiming the land for France.
Reputable source- 1492 onwardThe Age of Exploration
The Columbian Exchange
Columbus's voyages set off a vast, two-way transfer of plants, animals, people, and diseases between the Old World and the New, later named the Columbian Exchange. Maize, potatoes, and tomatoes spread to Europe, Asia, and Africa; wheat, horses, cattle, and sugar came to the Americas; and Old World germs such as smallpox and measles devastated Indigenous peoples who had no immunity.
Reputable source - 1500s onwardThe Age of Exploration
The Transatlantic Slave Trade
To work the plantations and mines of the Americas, European powers built a vast transatlantic trade in enslaved Africans. Over roughly three and a half centuries, an estimated twelve to eighteen million people were seized from Africa and shipped across the Atlantic in brutal conditions, with great numbers dying on the 'Middle Passage.'
Reputable source - 1609–1611The Age of Exploration
Henry Hudson and the Northwest Passage
Between 1609 and 1611 the English navigator Henry Hudson, sailing first for Dutch and then for English backers, searched for a northern sea route to Asia. He explored the great river and bay that now bear his name before his mutinous crew set him adrift to die in 1611.
Reputable source - March 16, 1926Space Exploration
Goddard launches the first liquid-fuel rocket
Robert Goddard launched the world's first liquid-fueled rocket from a farm in Auburn, Massachusetts. It flew for 2.5 seconds and rose 41 feet.
Primary source · 2 sources The V-2 crosses the edge of space
Germany's V-2 ballistic missile became the first human-made object to reach the edge of space during wartime test flights.
Reputable source- October 4, 1957Space Exploration
Sputnik 1 opens the Space Age
The Soviet Union launched Sputnik 1, the first artificial satellite, into orbit. Its radio beeps were audible to amateur operators around the world.
Reputable source - January 31, 1958Space Exploration
Explorer 1 — America reaches orbit
The first US satellite carried James Van Allen's cosmic-ray experiment and discovered the radiation belts that now bear his name.
Reputable source - October 1, 1958Space Exploration
NASA opens its doors
The National Aeronautics and Space Administration began operations, absorbing the earlier NACA and unifying US civilian spaceflight.
Primary source · 2 sources - April 12, 1961Space Exploration
Yuri Gagarin becomes the first human in space
Cosmonaut Yuri Gagarin orbited Earth once aboard Vostok 1 in a 108-minute flight before parachuting to a landing.
Reputable source - May 5, 1961Space Exploration
Alan Shepard is the first American in space
Shepard's 15-minute suborbital Freedom 7 flight made him the first American in space, weeks after Gagarin's orbit.
Primary source · 2 sources - June 16, 1963Space Exploration
Valentina Tereshkova — first woman in space
Tereshkova flew 48 orbits aboard Vostok 6, spending nearly three days in space on her only flight.
Reputable source · 2 sources - March 18, 1965Space Exploration
Alexei Leonov takes the first spacewalk
Leonov floated outside Voskhod 2 for about 12 minutes; his suit ballooned so badly he had to bleed air to squeeze back inside.
Reputable source - January 27, 1967Space Exploration
The Apollo 1 fire
A cabin fire during a launch-pad test killed astronauts Grissom, White, and Chaffee and halted the Apollo program for 20 months of redesign.
Reputable source - December 24, 1968Space Exploration
Apollo 8 and Earthrise
The first crewed flight to the Moon orbited it ten times; the crew's Earthrise photograph showed our planet rising over the lunar horizon.
Reputable source - July 20, 1969Space Exploration
Apollo 11 lands on the Moon
Neil Armstrong and Buzz Aldrin landed the lunar module Eagle in the Sea of Tranquility while Michael Collins orbited above; roughly 600 million people watched.
Reputable source · 2 sources - April 1970Space Exploration
Apollo 13: 'a successful failure'
An oxygen-tank explosion 200,000 miles from Earth forced the crew into the lunar module as a lifeboat; improvisation by crew and Mission Control brought them home.
Reputable source - December 1972Space Exploration
Apollo 17 — the last footsteps on the Moon
Gene Cernan and Harrison Schmitt, the first scientist on the Moon, closed out Apollo with three days of geology in the Taurus-Littrow valley.
Reputable source - May 14, 1973Space Exploration
Skylab, America's first space station
Launched on the last Saturn V, Skylab hosted three crews for up to 84 days and nearly failed at launch before a daring on-orbit repair.
Reputable source The Voyagers depart
Voyager 2 and Voyager 1 launched weeks apart on a rare planetary alignment, returning the first close portraits of Jupiter, Saturn, Uranus, and Neptune.
Reputable source- April 12, 1981Space Exploration
STS-1: the Space Shuttle flies
Columbia lifted off exactly 20 years after Gagarin, the first reusable orbital spacecraft, flown by John Young and Robert Crippen.
Reputable source - January 28, 1986Space Exploration
The Challenger disaster
Challenger broke apart 73 seconds after launch, killing all seven crew including teacher Christa McAuliffe; a failed O-ring seal was the cause.
Reputable source - April 24, 1990Space Exploration
Hubble opens its eye
The Hubble Space Telescope launched aboard Discovery; after a corrective-optics repair in 1993 it became the most productive telescope in history.
Reputable source - November 1998Space Exploration
The International Space Station begins
Russia's Zarya module launched, joined weeks later by the US Unity node — the start of the largest structure ever built in space.
Reputable source - February 1, 2003Space Exploration
The Columbia disaster
Columbia disintegrated during re-entry, killing its seven crew; foam debris had breached the wing's leading edge at launch.
Reputable source - October 4, 2004Space Exploration
SpaceShipOne wins private spaceflight
Burt Rutan's SpaceShipOne reached space twice in five days to win the $10M Ansari X Prize — the first private crewed spacecraft.
Reputable source - August 6, 2012Space Exploration
Curiosity's seven minutes of terror
The one-ton rover was lowered to Mars by a rocket-powered sky crane — a landing maneuver never attempted before.
Reputable source - December 21, 2015Space Exploration
A rocket lands itself
SpaceX's Falcon 9 delivered satellites to orbit, then flew its first stage back to a vertical landing at Cape Canaveral.
Reputable source · 2 sources - May 30, 2020Space Exploration
Crew Dragon flies astronauts
SpaceX's Demo-2 carried Bob Behnken and Doug Hurley to the ISS — the first crewed orbital flight by a private company, ending US reliance on Soyuz.
Reputable source - December 25, 2021Space Exploration
James Webb Space Telescope launches
Webb launched to the Sun-Earth L2 point and unfolded its 6.5-meter gold mirror in the most complex deployment ever attempted remotely.
Reputable source - November 16, 2022Space Exploration
Artemis I rounds the Moon
The uncrewed Orion capsule flew farther than any human-rated spacecraft ever has, validating the SLS rocket and heat shield for crewed flights.
Reputable source - April 1–10, 2026Space Exploration
Artemis II carries a crew around the Moon
Astronauts Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen flew NASA's Orion spacecraft on a 10-day lunar flyby — the first humans to travel to the Moon since Apollo 17 in 1972. Their trajectory carried them farther from Earth than any crew in history before a Pacific splashdown on April 10.
Reputable source