Two reasons why XKCD’s What If? series is so compelling:Even when an answer seems straightforward, the devil is in the details.And with respect to the details, Munroe does his due diligence.In this case, the answer to “what’s the longest possible sunset you can experience while driving, assuming you’re obeying the speed limit and driving on paved roads?” was fairly surprising and exact and the explanation delightful.Btw, the ending of the video is a callback to an early XKCD comic about angular momentum. Tags: science · videos · XKCD 💬 Join the discussion on kottke.org →