All mam­mals ha­ve the­ir own sec­rets, from a ti­ny bat to a hu­ge blue wha­le, from la­zy sloths to inc­re­dib­ly fast che­etahs. Just ta­ke a clo­ser lo­ok at them and you’ll see the unex­pected di­ver­si­ty of the ani­mal king­dom. In­te­res­ting facts, ama­zing dis­co­veri­es, Gu­in­ness re­cords, pho­tos that ta­ke your bre­ath away, all this helps a young na­tura­list dis­co­ver the be­auti­ful world of na­ture.