The Drake Equation is something that has fascinated me ever since I learned about it in another Gen Ed at Harvard. So, I would love to ask some questions about it. I know she said it is not useful for prediction because the uncertainties for some of the terms are too large. So, I guess my question would be surrounding which of these terms she feels the error is too large for prediction and if she has any hope that we may be able to decrease any of these uncertainties. I would assume it is the term that represents the length of an average civilization, which is a huge driving factor in the output of the equation, but I would be curious to hear her thoughts.