Add Yahoo as a preferred source to see more of our stories on Google. Cole Kan/CNET If you're a light sleeper who's sensitive to sound, then you know how difficult it can be to catch some Zs.

In 1996, in an episode called “Messages from Earth,” part of the beloved sci-fi TV series Babylon 5, Captain John Sheridan (Bruce Boxleitner) confesses to his Minbari colleague Delenn (the late, great ...