Our bodies have 3 billion genetic building blocks, or base pairs, that make us who we are.

And of those 3 billion base pairs, only a tiny amount are unique to us, making us about 99.9% genetically similar to the next human. Chloroplast Genome

A recent TED talk by physicist and entrepreneur Riccardo Sabatini demonstrated that a printed version of your entire genetic code would occupy some 262,000 pages, or 175 large books. Of those pages, just about 500 would be unique to us.  

This is because large chunks of our genome perform similar functions across the animal kingdom.

Quantitative Polymerase Chain Reaction Take a look at how genetically similar we are to everything around us: