Now: the moment you are reading this
One species that can map its own 13.8 billion years
Quick facts
- 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
What happened
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.
Sources
- NASA. The Universe: overview and history (NASA Science) (2024) · Reputable sourcescience.nasa.gov · The domain "science.nasa.gov" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Part of a timelineBig Bang to Now19 events · 13.8 billion years on one timeline you can zoom, from the first light to the present. Every turning point cited.View all →