On average, the universe is about 14 billion years old. Humans have inhabited the Earth for only a tiny sliver of time compared to the lifespan of the universe. Explore the history of the universe and imagine it as taking place in a calendar year to illustrate the brevity of human existence. Updated: 10/27/2021
The first human was born on October 27, 1921. This means that human existence spans just 0.0000008% of the total lifetime of the universe.