The Cerulean Hypothesis

CNN's John Sutter talks about the cerulean hypothesis. The theory is that there must be advanced intelligent alien life out there, and if we look long enough through all of the vast sandbox of stars and planets, we're going to find it. In South Africa, they discovered evidence of pesticide,. like ancient pesticide, and they're thinking, well, who was doing this? It could have been, could it have been some some plants like a plant? Maybe, but it could have been a pesticide is.