Mice and humans have a lot in common, new research finds. Both fall victim to the sunk cost fallacy that has them hanging on way too long to get the reward they were promised. That in an on-demand world, waiting for anything, especially payment, is a big no-no — and speed is all that matters. Or is it? In an age of fast, convenient and no-wait-never-ever, certainty is what matters most of all. …see more