Видео с ютуба How Many Hours Should You Sleep

How Much Sleep Do You Actually Need?

How much sleep do you really need? | Sleeping with Science, a TED series

Do You Really Need 8 Hours of Sleep Every Night? | Body Stuff with Dr. Jen Gunter | TED

Сколько сна вам действительно нужно?

The Science of Sleep: How Much Do You Really Need?

How Much Sleep Do You Need? - Professor Of Neuroscience, Russel Foster