Miracle mattress.

Texas has developed a mattress that should make users feel sleepy thanks to properly positioned cooling and heating elements. In particular, the central areas of the body are cooled, while the arms, legs and neck are heated. Two versions of the mattress (one with water and one with air) were tested on 11 volunteers. Participants were forced to go to bed two hours earlier than usual, and on some nights the cooling and heating functions were turned on, while on others they were not. The scientists found that cooling and warming up caused the subjects to fall asleep about 58% faster.