Explore.
Swipe through events, from the first stars to human history.
Inspired by Carl Sagan’s cosmic calendar
COSMIC CALENDAR
13.8 billion years. One calendar year.
Swipe from the Big Bang to today.
See where we fit into the history of the universe.
Available on iPhone and iPad. Android release in review.
The universe, on a calendar
- JANUARY 1
The Big Bang
- SEPTEMBER
Earth forms
- LATE DECEMBER
Dinosaurs appear
- DECEMBER 31
Humans appear
Approximate dates on the cosmic calendar.
Inside the app
Learn.
Read each story and follow its scientific sources.
Find.
Search the timeline or browse interesting cosmic facts.