The idea dates back to the mid-19th century when the notion of eight hours of work, eight for recreation and eight for sleep first took hold

The idea dates back to the mid-19th century when the notion of eight hours of work, eight for recreation and eight for sleep first took hold

Un estudio sobre las raíces antropológicas, genéticas y sociales del sueño muestra que el descanso no depende solo del reloj y que nuestros ancestros no dormían más que nosotros…