Deep Time Earth Clock
A 24-hour clock where the full face represents 4.5 billion years of Earth's history. Midnight = Earth forms. The second midnight = today. Humans appear at 11:58:43 PM. All of recorded history fits in the last half-second.
The full 24-hour face represents 4.5 billion years of Earth history. Midnight at the top is when Earth formed. The hand points straight up â to right now, the second midnight.
Click any dot around the face to see when that event happened on the geological clock.
The Deep Time Earth Clock compresses the entire 4.5-billion-year history of Earth into a single 24-hour clock face. Earth forms at midnight. The first life appears at around 4:30 AM. Dinosaurs don't arrive until 11:41 PM. Homo sapiens appear at 11:58:43 PM â just 77 seconds before midnight. All of recorded human civilisation occupies the final half-second of the clock.
How to Read the Deep Time Clock
- The clock face runs 24 hours â but each second represents 52,083 years of real geological time.
- Event markers appear around the clock face. Click any marker to read the geological context and see the exact clock time it falls on.
- Scroll down to see all events listed with their clock times, plus stat cards showing Earth's remaining life expectancy.
Frequently Asked Questions
What time does 'right now' appear on the clock?
Right now is midnight â the second one. The clock runs from the first midnight (Earth forms, 4.5 billion years ago) to the second midnight (today). Everything in human history â from the first cave paintings to the internet â occupies the last 0.45 seconds of the 24-hour face.
When do dinosaurs appear on the clock?
Dinosaurs first appear at approximately 11:41 PM â just 19 minutes before midnight. They dominate for about 12 clock minutes before the Chicxulub impact at 11:53 PM wipes them out. The 66 million years since the impact â the entire age of mammals â fits in the last 7 minutes of the clock.
When does Earth become uninhabitable?
In approximately 1 billion years, the Sun will have brightened enough to evaporate Earth's oceans. Complex life would likely end before that â around 500â800 million years from now â as increasing solar luminosity makes the planet too hot for most organisms. On the Deep Time Clock, that is approximately 3.2 hours from midnight.