Big Bang to Now
13.8 billion years on one timeline you can zoom, from the first light to the present. Every turning point cited.
The whole story at its widest zoom: the turning points that take you from the Big Bang to this morning, each one a doorway you can open. This is a spine, not an encyclopedia. It states each turning point once, at the largest scale, and is built to link down into detailed timelines that cover an era in full. Every date here is traceable to NASA, ESA, the Smithsonian, the Natural History Museum, or another authority we opened and read.
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- 13.8 billion years agoWell documented
Reputable source · 3 sourceswhy?
Best source: The Universe: overview and history (NASA Science)
The domain "science.nasa.gov" is on our Reputable source registry.The Big Bang
About 13.8 billion years ago, the universe began in an extraordinarily hot, dense state and started to expand, and it has been expanding ever since. In the first tiny fraction of a second it went through a burst of runaway growth that cosmologists call cosmic inflation, during which space itself stretched faster than the speed of light. As it expanded it cooled, and over the following minutes the first atomic nuclei formed out of the cooling soup of particles. Every atom in your body, every star you can see, and every event further along this timeline traces back to this single beginning. NASA notes that the origin, evolution, and nature of the universe are still being worked out, so parts of the earliest instants remain open questions.
Why it matters: This is the zero point of everything. Each later event here, and on every other timeline the site holds, from the rise of the dinosaurs to yesterday's news, sits somewhere in the 13.8 billion years that unfold from this moment. It is the widest possible frame for history.
How we know: The 13.8-billion-year age is not a guess but a measurement, pinned down by studying the oldest light in the sky with missions like NASA's WMAP and the European Space Agency's Planck, which independently arrive at roughly the same number. NASA's own summary of the universe's history describes the inflation and expansion, while being candid that the very first instants are still under study.
Age of the universe: About 13.8 billion years · First instant: Cosmic inflation, space expanding faster than light · Still happening: The universe is still expanding today · Status: The earliest instants remain an open scientific question
- About 380,000 years after the Big BangWell documented
Primary source · 3 sourceswhy?
Best source: WMAP: mapping the cosmic microwave background (NASA)
Cited as a "primary" source (no stronger domain match).The first light: the cosmic microwave background
For its first few hundred thousand years the universe was so hot and crowded that a vast number of free electrons scattered light in every direction, leaving it in a kind of glowing fog through which nothing could be seen. Around 380,000 years after the Big Bang, in a stage scientists call recombination, it finally cooled enough for those electrons to join with nuclei into neutral atoms. Light was suddenly free to travel in straight lines, and it streamed out across the whole sky at once. That ancient light is still arriving today, stretched by the expanding universe into faint microwaves called the cosmic microwave background, the oldest light we can observe.
Why it matters: The background glow is the earliest baby picture of the cosmos, a snapshot from when it was less than a thousandth of its current age. Reading the tiny temperature ripples frozen into it is how astronomers measured the universe's age, its overall shape, and what it is made of, so much of what we know about the whole of time comes from this one faint signal.
How we know: NASA describes recombination at about 380,000 years and the fog of electrons that came before it. NASA's WMAP spacecraft, launched on 30 June 2001 and operating until 2010, mapped the temperature differences across this background light over the entire sky, and those measurements are a large part of how the 13.8-billion-year age was fixed.
When: About 380,000 years after the Big Bang · What it is: The oldest light we can observe, now stretched into microwaves · Before it: A fog of free electrons that scattered all light · Mapped by: NASA's WMAP (launched 2001)
- About 13.5 billion years agoWell documented
Reputable source · 2 sourceswhy?
Best source: The Big Bang (NASA Science)
The domain "science.nasa.gov" is on our Reputable source registry.The first stars ignite
After the first light faded, the universe entered a long stretch astronomers call the dark ages, with no stars in it at all, only cooling clouds of hydrogen and helium left over from the Big Bang. Slowly, gravity drew those clouds together until the densest knots grew hot enough at their cores to ignite as the first stars. NASA describes these first stars as giants, 30 to 300 times the mass of our Sun and millions of times brighter, which meant they burned through their fuel quickly and died young in enormous explosions.
Why it matters: These first stars did something no earlier part of the universe could: they forged elements heavier than hydrogen and helium in their cores, then scattered them into space when they exploded. The carbon in your cells, the oxygen you breathe, and the iron in your blood were all built inside stars like these. Without this generation, there would be no planets and no chemistry for life.
How we know: NASA's account of the Big Bang and the early universe lays out the sequence from the dark ages to the first stars and the reionization that followed, and gives the size and brightness of that first stellar generation.
The dark ages: A long era with no stars, only gas · First stars: 30 to 300 times the Sun's mass, millions of times brighter · What they made: The first elements heavier than helium · Their fate: Burned fast and died young in explosions
- About 13 billion years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: A time-resolved picture of our Milky Way's early formation history (Nature, 2022, via PubMed Central)
Cited as a "journal" source (no stronger domain match).The Milky Way begins to form
Our own galaxy started coming together remarkably early. Using data from its Gaia mission, which measured the positions, motions, and ages of millions of individual stars, the European Space Agency showed that a major part of the Milky Way known as the thick disc began forming about 13 billion years ago. That is only around 0.8 billion years after the Big Bang, and roughly 2 billion years earlier than astronomers had expected the galaxy's structure to appear.
Why it matters: The Milky Way is the galaxy the Sun, the Earth, and you belong to. Learning that its backbone assembled this close to the beginning places our entire local story near the dawn of cosmic history rather than late in it, and it shows how quickly the raw universe organized itself into the kind of galaxy that could one day hold planets and people.
How we know: The finding comes from ESA's Gaia spacecraft, a mission built to chart the Milky Way in three dimensions. By dating the galaxy's oldest stars from their light and tracking how they move, researchers pushed the age of the thick disc back to about 13 billion years, a result ESA describes as surprising precisely because it is so early.
Milky Way's thick disc: Began forming about 13 billion years ago · After the Big Bang: Only about 0.8 billion years · Surprise: Roughly 2 billion years earlier than expected · Measured by: ESA's Gaia mission, from millions of stars
- 4.6 billion years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Evidence from stable isotopes and 10Be for Solar System formation triggered by a low-mass supernova (Nature Communications, via PubMed Central)
Cited as a "journal" source (no stronger domain match).The Sun and Solar System form
About 4.6 billion years ago, a giant, slowly spinning cloud of gas and dust called the solar nebula began to collapse under its own gravity. Most of the material fell inward and piled up at the center until it grew dense and hot enough to ignite as the Sun, which NASA describes as a yellow dwarf star, a hot glowing ball of hydrogen and helium about 4.5 billion years old. The leftover material spread into a disk around the new star, and out of that disk the planets, moons, asteroids, and comets slowly assembled.
Why it matters: This is the birth of the Sun and the source of every scrap of material in the Solar System, including the rock and water that became Earth. Everything that happens on later parts of this timeline happens in orbit around this one ordinary star, which sits about 93 million miles from the planet you are on.
How we know: NASA's facts on the Sun give its formation date of about 4.6 billion years ago, describe the collapse of the solar nebula, and identify the Sun as a yellow dwarf made mostly of hydrogen and helium.
Sun formed: About 4.6 billion years ago · From: The collapsing solar nebula, a cloud of gas and dust · What the Sun is: A yellow dwarf star of hydrogen and helium · Distance from Earth: About 93 million miles
- About 4.5 billion years agoWell documented
Reputable source · 2 sourceswhy?
Best source: Earth: facts (NASA Science)
The domain "science.nasa.gov" is on our Reputable source registry.Earth forms
As the young Solar System settled into its current layout about 4.5 billion years ago, gravity pulled swirling gas and dust in the disk around the Sun together into larger and larger clumps, and one of them became Earth, the third planet out. The early Earth was a violent, largely molten world, bombarded by leftover debris and far too hot for the oceans and continents we know. Over time it cooled, grew a solid crust, released gases that formed an early atmosphere, and eventually held liquid water.
Why it matters: Every human being who has ever lived, and every event on every human timeline the site holds, takes place on this one planet. Its formation is where the story stops being about the universe in general and starts being about home.
How we know: NASA's facts on Earth describe its formation as the Solar System settled into place about 4.5 billion years ago, when gravity pulled gas and dust together to build the planet.
Earth formed: About 4.5 billion years ago · Position: Third planet from the Sun · Early state: Molten and heavily bombarded, cooling over time · Built from: Gas and dust in the disk around the young Sun
- About 4.5 billion years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Identification of the giant impactor Theia in lunar rocks (Science, 2014, via PubMed)
Cited as a "journal" source (no stronger domain match).The giant impact that made the Moon
Not long after Earth formed, it suffered one of the most violent events in its history. The leading explanation, the giant impact theory, holds that an object roughly the size of Mars struck the young Earth and flung enough molten and vaporized rock into space that the debris settled into orbit and came together to form the Moon. NASA places this collision near the time of the Solar System's formation, about 4.5 billion years ago, and notes that any complete theory of the Moon still has to explain everything we observe about it today.
Why it matters: The Moon is not just scenery. Its gravity steadies the tilt of Earth's axis, which keeps the climate relatively stable over long spans, and it raises the ocean tides. Its ancient, cratered surface also preserves a record of the early Solar System that Earth's restless, weathered surface long ago erased, so the Moon is a kind of archive of the violence this event is part of.
How we know: NASA's explanation of how the Moon formed describes the Mars-size impactor, the molten and vaporized debris thrown into space, and the giant impact theory, while being clear that the theory is still tested against new observations.
When: About 4.5 billion years ago · Impactor: An object roughly the size of Mars · How the Moon formed: From debris flung into orbit by the collision · What the Moon does: Steadies Earth's tilt and drives the tides
- About 3.8 billion years agoEstimated
Peer-reviewed · 2 sourceswhy?
Best source: Geological constraints on detecting the earliest life on Earth: SW Greenland (>3.7 Gyr) (Phil. Trans. R. Soc. B, via PubMed Central)
Cited as a "journal" source (no stronger domain match).Life begins on Earth
Sometime in Earth's first billion years, in the planet's early oceans, chemistry crossed the line into biology and the first living things appeared. NASA points to those vast early oceans as a convenient place for life to begin about 3.8 billion years ago. The earliest organisms were microscopic, single-celled, and left only faint chemical and fossil traces in very old rocks, which is why the exact timing is uncertain and the earliest claimed evidence is actively debated by scientists.
Why it matters: Everything alive today, every bacterium, redwood, whale, and human, descends from those first cells in an unbroken chain of copying and change. This is the root of the entire tree of life, and the moment the planet stopped being merely chemical and started being inhabited.
How we know: NASA's facts on Earth date the beginning of life to about 3.8 billion years ago in the early oceans. We mark this event's confidence as estimated on purpose, because the earliest fossil and chemical signatures of life are genuinely disputed among researchers, and honest history says so rather than pretending the date is settled.
Life begins: About 3.8 billion years ago (earliest evidence, debated) · Where: Earth's early oceans · First life: Microscopic and single-celled · Why the date is uncertain: The oldest traces are faint and contested
- About 2.4 billion years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Cyanobacteria and the Great Oxidation Event: evidence from genes and fossils (Palaeontology, via PubMed)
Cited as a "journal" source (no stronger domain match).The Great Oxidation Event
For roughly the first half of Earth's history the air held almost no free oxygen, and the planet's chemistry was completely different from today's. Then cyanobacteria, microbes that make energy from sunlight through photosynthesis, released oxygen as a waste product, and over hundreds of millions of years it built up faster than the rocks and oceans could absorb it. The American Society for Microbiology places this Great Oxidation Event sometime between about 2.4 and 2.1 billion years ago, when oxygen finally accumulated in the atmosphere.
Why it matters: This was one of the largest changes in the planet's chemistry ever, and it was driven entirely by life. Oxygen was toxic to much of the life that existed at the time, so it reshaped which organisms could survive, and it eventually made possible the oxygen-breathing, complex life, including animals and us, that came much later. A microbe rewrote the atmosphere of a whole world.
How we know: The American Society for Microbiology describes the Great Oxidation Event and dates it to roughly 2.4 to 2.1 billion years ago, explaining that oxygen-producing cyanobacteria were the cause and that Earth's atmosphere before it was very different.
When: About 2.4 to 2.1 billion years ago · Cause: Oxygen from photosynthesizing cyanobacteria · Before it: Almost no free oxygen in the air · Consequence: Toxic to much existing life; enabled complex life later
- About 539 million years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: The Cambrian explosion (Current Biology, 2015, via PubMed)
Cited as a "journal" source (no stronger domain match).The Cambrian explosion
The Cambrian Period, which the Natural History Museum dates from about 539 to 485 million years ago, opened with a burst of animal evolution so rapid and far-reaching that it is called the Cambrian explosion. In a geologically short window, thought to be only the first 20 million years or so of the period, animals diversified into full-bodied creatures with a wide range of body plans and lifestyles. Those body plans define what scientists call phyla, the major groups all animals are sorted into, of which there are nearly 40. Trilobites, hard-shelled arthropods with jointed legs and antennae, are the characteristic animals of the period.
Why it matters: Almost every kind of animal alive today, including the group that eventually led to us, traces its basic body plan back to this window. The change was so pronounced that the roughly four billion years of Earth history before it are often lumped together simply as the Precambrian, a single word for everything that came earlier.
How we know: The Natural History Museum in London dates the Cambrian to 539 to 485 million years ago, describes the rapid diversification into nearly 40 animal phyla, and identifies trilobites as the characteristic arthropods of the period.
Cambrian Period: About 539 to 485 million years ago · The explosion: Rapid, in roughly the first 20 million years · What appeared: Most major animal body plans; nearly 40 phyla · Signature animal: Trilobites
- About 245 million years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Gnathovorax cabreirai: a new early dinosaur and the origin and initial radiation of predatory dinosaurs (PeerJ, 2019, via PubMed Central)
Cited as a "journal" source (no stronger domain match).Dinosaurs rise
Dinosaurs first appeared in the Triassic Period, around 245 million years ago, and went on to dominate life on land for the next 180 million years or so, through the Jurassic and Cretaceous that followed. Over that immense span they ranged from small, fast, feathered hunters to the largest animals ever to walk the Earth. One branch of the dinosaurs survived everything that came later and is still alive all around us: the birds.
Why it matters: The age of dinosaurs is the single longest chapter in the story of large land animals, and it is the one most people picture when they imagine deep time. Because it ran for so long and ended so abruptly, it also sets up the event that follows it. This entry is a doorway: at this scale it is one line, but it opens onto a much more detailed timeline of its own.
How we know: The Natural History Museum dates the first dinosaurs to the Triassic Period, around 245 million years ago, and notes that birds are the living descendants of the dinosaur line.
First dinosaurs: Triassic Period, around 245 million years ago · Length of reign: More than 180 million years · Range: From small feathered hunters to the largest land animals ever · Living dinosaurs today: Birds
SourcesRelated timelines- Age of Dinosaurs → · Zoom in: the full 180-million-year story of the dinosaurs
- 66 million years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Reduced contribution of sulfur to the mass extinction associated with the Chicxulub impact event (peer-reviewed, via PubMed Central)
Cited as a "journal" source (no stronger domain match).The asteroid that ended the dinosaurs
About 66 million years ago, at the end of the Cretaceous Period, an asteroid several kilometers wide slammed into what is now the coast of Mexico, leaving the huge, buried Chicxulub crater. The Natural History Museum calls the result one of the most dramatic mass extinctions Earth has ever seen: the impact threw so much material into the atmosphere that soot and dust darkened the sky worldwide and cut off sunlight, and all non-bird dinosaurs, along with many other groups of animals, died out. The first clue to the cause was a thin layer of iridium, a metal common in asteroids but rare in Earth's rocks, found in rocks from exactly the end of the Cretaceous by Luis and Walter Alvarez in the late 1970s.
Why it matters: This single event ended the 180-million-year age of dinosaurs and cleared the world for mammals, the group that had lived in the dinosaurs' shadow and now expanded into the empty space they left behind. That group eventually produced primates and, much later, us. If the asteroid had missed, our branch might never have had room to rise.
How we know: The Natural History Museum describes the 66-million-year-old impact, the buried Chicxulub crater off Mexico, the worldwide blackout of sunlight, and the iridium evidence behind the Alvarez hypothesis, now the most widely accepted explanation for the extinction.
When: 66 million years ago, end of the Cretaceous · Impact site: The buried Chicxulub crater, off Mexico · Mechanism: Sky darkened worldwide, sunlight cut off · First clue: A layer of iridium (Alvarez, late 1970s)
SourcesRelated timelines- Age of Dinosaurs → · Zoom in: the impact, the extinction, and what survived
- About 6 million years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Earliest evidence of hominin bipedalism in Sahelanthropus tchadensis (peer-reviewed, via PubMed Central)
Cited as a "journal" source (no stronger domain match).Early humans stand up
One of the very first traits that set our lineage apart from other apes was walking upright on two legs. The Smithsonian's Human Origins Program traces the oldest evidence for it back about 6 million years, to early species such as Sahelanthropus that may have walked on two legs. For millions of years afterward, from at least 6 to 3 million years ago, our ancestors combined apelike and humanlike ways of moving, still climbing trees but increasingly walking upright on the ground, before becoming mostly bipedal by around 4 million years ago.
Why it matters: Walking on two legs freed the hands from the work of moving around, and over deep time those free hands went on to carry food, make tools, and eventually build every human thing on this timeline. It is the physical foundation of almost everything that makes our species distinctive.
How we know: The Smithsonian Human Origins Program dates the oldest evidence for walking upright to about 6 million years ago, based on fossil bones, and describes the long transition from combining apelike and humanlike movement to becoming mostly bipedal by about 4 million years ago.
Oldest evidence for walking upright: About 6 million years ago · Early example: Sahelanthropus · Transition: Apelike and humanlike movement combined for millions of years · Mostly bipedal: By about 4 million years ago
SourcesRelated timelines- Human Evolution → · Zoom in: the fossils tracing how we came to walk upright
- About 2.6 million years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: 2.6-million-year-old stone tools and associated bones from OGS-6 and OGS-7, Gona, Afar, Ethiopia (Journal of Human Evolution, 2003, via PubMed)
Cited as a "journal" source (no stronger domain match).The first stone tools
By about 2.6 million years ago, early humans were deliberately making the first stone tools. The Smithsonian describes this earliest toolkit, known as the Oldowan, as the most basic stone implements: hammerstones, stone cores, and the sharp flakes struck off them, which could cut and scrape in ways bare hands could not. Toolmaking then spans the whole 2.6 million years since, a record that runs unbroken from a chipped stone flake all the way to the device you are reading this on.
Why it matters: Tools let our ancestors act on the world instead of only adapting to it: butchering meat, working wood, and eventually reshaping their whole environment. Every technology on every later timeline the site holds, from the printing press to the microchip, is a distant descendant of this first sharp flake.
How we know: The Smithsonian Human Origins Program describes stone toolmaking spanning the past 2.6 million years, beginning with the Oldowan toolkit of hammerstones, cores, and sharp flakes.
First stone tools: About 2.6 million years ago · Toolkit: Oldowan: hammerstones, cores, sharp flakes · What they enabled: Cutting and scraping beyond what hands can do · The record since: An unbroken 2.6-million-year run of toolmaking
SourcesRelated timelines- Human Evolution → · Zoom in: the full 7-million-year story of human evolution
- About 300,000 years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: New fossils from Jebel Irhoud, Morocco and the pan-African origin of Homo sapiens (Nature, 2017, via PubMed)
Cited as a "journal" source (no stronger domain match).Homo sapiens appears
Our own species, Homo sapiens, evolved in Africa about 300,000 years ago, according to the Smithsonian, and every person alive today belongs to it. For most of that time our ancestors lived across Africa; only much later did they spread out to populate the rest of the planet, until the species that started on one continent now lives worldwide. We are, in the long view of this timeline, a very young kind of animal.
Why it matters: This is the arrival of us. Every war, invention, migration, religion, and work of art on the human timelines the site holds was made by members of this one recent species, in the last sliver of the 13.8 billion years above. Everything people usually mean by history happens after this line.
How we know: The Smithsonian Human Origins Program gives the age of Homo sapiens as about 300,000 years ago, states that the species evolved in Africa and now lives worldwide, and identifies it as the species to which all living people belong.
Homo sapiens: About 300,000 years ago · Where: Evolved in Africa, now worldwide · Who belongs to it: Every living human · In context: A very recent arrival on this timeline
SourcesRelated timelines- Human Evolution → · Zoom in: the discovery that rewrote when our species began
- About 12,000 years agoWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Domestication and early agriculture in the Mediterranean Basin: origins, diffusion, and impact (PNAS, via PubMed Central)
Cited as a "journal" source (no stronger domain match).Farming begins
Beginning about 12,000 years ago, people in several parts of the world independently began to domesticate plants and animals rather than only hunting wild game and gathering wild plants. World History Encyclopedia describes the first crops and livestock being domesticated across roughly six separate regions, including the Near East, China, Southeast Asia, and Africa. This shift, often called the Neolithic Revolution, unfolded over generations rather than overnight.
Why it matters: Farming let people stay in one place and store surplus food, and that surplus is what made permanent villages, then cities, then states and armies and writing possible. Almost everything usually called civilization grows out of this change, so a great deal of recorded history is, at bottom, a consequence of people learning to grow their own food.
How we know: World History Encyclopedia dates the beginning of agriculture to about 12,000 years ago and describes its independent origins in roughly six regions around the world, naming the Near East, China, Southeast Asia, and Africa among them.
Farming begins: About 12,000 years ago · Where: About six regions independently, including the Near East, China, Southeast Asia, Africa · Also called: The Neolithic Revolution · What it enabled: Settled villages, surplus food, and eventually cities
SourcesRelated timelines- The Neolithic Revolution → · Zoom in: from the first domesticated wheat to the first city
- Around 3500 BCEWell documented
Peer-reviewed · 2 sourceswhy?
Best source: Early urban development in the Near East (Science, via PubMed)
Cited as a "journal" source (no stronger domain match).The first cities and writing
In the cities of Sumer, in southern Mesopotamia, writing was invented around 3600 to 3500 BCE, and World History Encyclopedia locates the earliest true writing in the Sumerian city of Uruk. It began as pictographs, simple symbols standing for objects, pressed into wet clay with a reed to keep track of goods and accounts. Over time those pictures gave way to phonograms, marks that stood for sounds, in the script we call cuneiform, and writing grew from a bookkeeping tool into a way to record law, story, and history.
Why it matters: Writing is the line where recorded history begins. Everything before it is prehistory, reconstructed from bones, stone, and inference, while everything after it, people could set down in their own words and pass on directly. This is the point on the timeline where the human record starts to fill with actual names, dates, and voices.
How we know: World History Encyclopedia dates the invention of writing to Sumer, southern Mesopotamia, around 3600 to 3500 BCE, locates it in the city of Uruk, and describes the shift from pictographs to the phonetic cuneiform script pressed into clay with a reed.
First writing: Sumer, southern Mesopotamia, around 3600 to 3500 BCE · City: Uruk · Earliest form: Pictographs pressed into wet clay · Script: Cuneiform, later using sound-symbols (phonograms)
SourcesRelated timelines- The Neolithic Revolution → · Zoom in: Uruk, the first city, and the invention of writing
- 1760 to 1840Well documented
Peer-reviewed · 2 sourceswhy?
Best source: Limited waterpower contributed to the rise of steam power in British 'Cottonopolis' (PNAS Nexus, via PubMed Central)
Cited as a "journal" source (no stronger domain match).The Industrial Revolution
Between about 1760 and 1840, beginning in Britain, work moved out of the home and the workshop and into factories built around steam-powered machines. World History Encyclopedia describes the mechanization of production and the deep social change that came with it, as people crowded from the countryside into fast-growing industrial cities to run and tend the new machines. Earlier gains in agriculture had freed up labor, and that labor now poured into manufacturing.
Why it matters: The Industrial Revolution changed almost everything measurable about human life: how people worked, where they lived, how many of them there were, and how much fuel they burned. Most of the modern world grows out of this stretch, and so does the modern climate, since the large-scale burning of fossil fuels starts here. It is the near end of the timeline, the point where the deep past turns into the world you recognize.
How we know: World History Encyclopedia dates the British Industrial Revolution to 1760 to 1840 and describes its steam-powered machinery, the move of work into urban factories, and the social upheaval that followed.
When: About 1760 to 1840 · Where it began: Britain · The change: Steam-powered machines and factory production · Social effect: Mass movement from countryside to industrial cities
SourcesRelated timelines- The Industrial Revolution → · Zoom in: iron, steam, textiles, railways, and the human cost
- The present, 2026Well documented
Reputable sourcewhy?
Best source: The Universe: overview and history (NASA Science)
The domain "science.nasa.gov" is on our Reputable source registry.Now: the moment you are reading this
Here the timeline reaches you. In the thin slice of time between the first stone tools and this morning, one species learned to farm, to write, to build machines, and then to turn its instruments on the sky and measure the age of the universe itself, 13.8 billion years, and lay the whole story out on a single line you can zoom. You are reading this at the very near end of everything above, in a present that is still being written.
Why it matters: The point of a timeline like this is the vertigo of scale. All of recorded history, every name and date in every book, is barely the last thumbnail's width of a line that runs back 13.8 billion years. Every other timeline the site holds, from the rise of Rockstar Games to the fall of Rome, fits somewhere on this one, usually in that final sliver. Zooming out is a way to feel how much came before us, and how recent we are.
How we know: The reconstruction of cosmic history, including the 13.8-billion-year age of the universe, rests on the observations NASA and ESA summarize, from the cosmic microwave background to the ages of the oldest stars. The present is simply where the record currently ends, and this timeline is living: as the story moves forward, so does its last event.
Span above you: About 13.8 billion years · Recorded history: The last roughly 5,500 years of it · Homo sapiens: The last roughly 300,000 years · This timeline: Living; its final event moves with the present
Sources