One half of your brain won’t sleep as deeply as the other, when sleeping in a foreign environment, like a hotel room
“Sleep is the greatest legal performance enhancing drug that most people are probably neglecting”
One hour of iPhone use before bed will delay the onset of melatonin production by about 3 hours (your peak melatonin levels will also be about 50% less)
Your brain needs to drop its temperature 2-3 °F in order to sleep (so keep your room as cold as you can tolerate)
Men who sleep 5-6 hours a night will have a level of testosterone 6-10 years their senior
Humans beings are the only species that deprive themselves of sleep for no apparent gain. Mother nature has never faced the challenge of coming up with a safety net for lack of sleep.