Earlier today I received a reader-submitted question from Bryan in New York. He asks, “How many atoms are there on Earth?”
Whether purposefully or not, Bryan has asked a very difficult question, and one that is nearly impossible to answer exactly. But, thanks to science, we can estimate.
According to the US Department of Energy’s Jefferson Lab, the answer is:
That answer comes from an estimation of the number of atoms in each of Earth’s elements, like Iron, Oxygen, Silicon, Magnesium, Sulfur … etc. Adding them all together, we get a number that works as an estimate.