To return to the original question, "How long can humans stay awake?" the ultimate answer remains unclear. Despite the rat studies in Chicago, I am unaware of any reports that sleep deprivation per se has killed any human (excluding accidents and so forth). Indeed, the U.S. Department of Defense has offered research funding for the goal of sustaining a fully awake, fully functional "24/7" soldier, sailor, or airman. Future warriors will face intense, around-the-clock fighting for weeks at a time. Will bioengineering eventually produce genetically-cloned soldiers and citizens with a variant of Morvan¿s syndrome who need no sleep but remain effective and happy? I hope not. A good night¿s sleep is one of life¿s blessings. As Coleridge wrote years ago, "Oh sleep! It is a gentle thing, beloved from pole to pole," and Wilse Webb, a prominent sleep researcher, more recently called sleep the gentle tyrant: It can be delayed but not defeated.