Wondering why we sleep? Or what happens when we don't sleep? Or which animal spends over two thirds of each day asleep? This book is full of facts about sleep, including many interesting random facts. Take a look inside to find out.
Este libro est lleno de datos divertidos e interesantes sobre el sue o. Sabes por qu dormimos? O qu pasa cuando no dormimos lo suficiente? O qu animal pasa m s de dos tercios de cada d a durmiendo? Echa un vistazo adentro para averiguarlo.