The Origins of DNA

I was hoping to win the board game with a question of my borehole. Do you remember that one? That was more than two months ago. No, I didn't win the chap who answered it one. Oh no, that must have stung a bit. It really did. But I'll just try to thank him if he's listening. The answer is porous rock. How does it know that there's water there? Was the question and the answer was because the rock is porous, it will find the water. All right then. Let's have a go.