Your 40 trillion cells copy themselves daily - but imperfect copying creates mutations

Each of the cells have to divide and copy themselves. And that's why we are still here today compared to yesterday. And that's why we're still gonna be here tomorrow compared today. Copy paste, copy paste, copy paste. That's how we actually make our way through life by our having ourselves 40,000,000,000,000 healthy cells copying themselves. Now, copying our cells through our DNA is you have to copy the DNA, too, the genetic instructions it's a pretty big job. And if you don't copy perfectly, the cells don't copy perfectly, you wind up having a mutation.