Tired? We all know the feeling: irritable, groggy and exceptionally lazy. Chances are you didn’t sleep enough last night… or the past few nights. But what exactly is “enough” sleep? And more importantly, can you ever “catch up” on it?
Video created by AsapSCIENCE
Speakdating c’est dores-et-déjà plus de 1 000 activités et leçons,
plus de 40 000 exercices, là tout prêts, dans votre poche.