There are more than seven billion human beings living on Earth. That sounds like a lot until you imagine all of them sitting in a pile in the Grand Canyon.
Vsauce created this "species portrait" as part of their latest episode, "How Many Things Are There?" It also informs us that each of us will not produce enough saliva in our lifetimes to fill an Olympic-sized swimming pool and that humanity is vastly outnumbered by LEGO bricks. But as for the question of how many things exist, prepare yourself for some very, very big numbers: