“We sleep less as we age because our brains don’t think we’re tired”

This is quite interesting, and it may — we can dream! — lead to helpful treatments:

http://www.popsci.com/sleep-quality-age?src=SOC&dom=tw

Some of my students have absolutely no problem sleeping.  It might be their youth, of course.  (Many will suggest that.)  But I prefer to think that my lectures and my personality are significant contributing factors.  Now, if I could only find some way to monetize my remarkable soporific powers, I could retire wealthy.