4.5 billion years is a big number to comprehend.
'Don't blink or you might miss all of human history.' Kurzgesagt - In A Nutshell brings this immense timeline to life in just one hour, in a video which has since gone viral.
The video takes the viewer back to the formation of oceans, through to all forms of life that have lived on planet Earth.
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It explains and illustrates the journey of Earth, and it's bringing viewers to tears in the process.
The video simplifies the vastness of time by taking a unique approach, as the narrator tells the viewer to consider 'every second passing as 1.5 million years'. As the video is one hour long, viewers are told all of Earth's timeline of 4.5 billion years by the end of the video.
At the start of the video, the narrator says: "Watch the eons pass and experience how long a billion years really is."
See it for yourself below:
Beginning with the formation of Earth's oceans, the viewers are taken on an emotional journey through the Hadean period and Cretaceous era. Until finally, views are met with the Quaternary period - the one we live in now.
At the end of the video, it becomes present day, and Kurzgesagt emphasises how new us humans really are to the planet. And by 'new', we're talking around 2.6 million years ago. But that's relatively new in comparison to 4.5 billion years.
If you've ever watch videos from the Kurzgesagt team, you'll know that they tend to create videos on complex topics from a humorous standpoint. As in the '4.5 Billion Years in 1 Hour' video, they mention how the Earth is 4.5 billion years old, which is approximately the same amount of time it took them to create this video.
Viewers are loving the viral video's in-depth explanations, with one commenting: "It's one thing to understand the concept of deep time on a conceptual level, but to experience the seconds go by, and actively comprehending the millions of years that equates to, it's a profound experience.'
The video is helping people understand the universe in simple, well-explained manner, with another viewer writing: "I must say, that this probably the finest documentary about the history of our planet that I’ve ever seen.
"Over the years, I’ve seen countless documentaries and videos about the history of earth, but never have I seen it so succinctly shown in such an understandable manner."