Does Over Consumption of Menthol Cause Sleepiness? I found no substantial sources either to suport or refute this argument. I have heard it from a few sources not perfectly reliable. I do know that ...
An unsourced claim on Wikipedia is that single-handed sailors only sleep one hour at a time: Most single-handers use the technique of napping for 15 to 20 minutes at a time, using a timer to wake ...