Kleitman often used himself as a subject in his sleep research, particularly on sleeplessness—whether in a pitch-black cave in Kentucky, in an underwater submarine during World War II, or on a trek ...

“It’s probably a significant efficiency gain to have more options for the kind of cave dwellers and the people who just want to sit in their room and do the work by themselves, again, like me ...

A ninth cave where the millipede occurred was destroyed by a quarry. “These tiny cave dwellers have been around for millions of years, but they could disappear forever in the next few decades,” said ...