Stress will be the biggest obstacle on human path to Mars in the next 20 years.
A new study said: If you live long on the universe, astronauts will be short, fat and ... bald.
Only gods enjoy the privilege of sleeping, and the worker ants are forced to enlist hundreds of times a day.
Early weaning and eating solid foods before 6 months of age help babies achieve deeper sleep and less awake at night.
Sleep is a recurring natural activity whose sensations and movements are temporarily postponed.
A deep sleep and enough capital brings a lot of health benefits. But according to a recent study, sleep also plays a huge role in society.
People often say that a deep sleep is enough to erase painful memories. Just sleep, then everything will be fine.
Patients with sleep apnea can wake up 5-30 times per hour and it is difficult to reach a deep sleep stage which can lead to exhaustion.
People still have a conscious experience in most states of sleep, including deep sleep.
The body needs to sleep at least 7 hours at night and a nap at noon to ensure active energy, the mind is always alert.