Dogs(狗)
Dogsbelongtothecanine.
Whenadogfollowsitsnose,it’sactuallybeingledbytheekeysenses.Sight:aglimpseoftheenemysavesthembarkingupthewrongtree.Sound:abarkcanbeafiercethreat,butit’salsohowcaninesmaketheirlongdistancecalls.Smell:thistellsadogmorethanalltheothersensesputtogether.
Insideitsnosearearoundtwohundredmillionsmellsensitivecells,fortytimesmorethaninhumans.Throughthemthedog’sbraincanpickupsignalsfromonemoleculeofscentinamillion.Itgivesthedog:acompletelydifferentpictureoftheworld,basedonwhatitsmells,ratherthanwhatitsees.
Flowersareirrelevanttoadog.Sotheirscentismeaningless.Butfoodisaseriousmatter.Whattousisanemptyplate,iscoveredwiththesmellofchickentoahungrydog.
狗
狗属于犬科劝物.
当狗用鼻子嗅着前行时,实际上有三种感觉在起作用:视觉,瞥一眼就知道敌人在哪儿;听觉,犬吠有一种凶猛的威慑力,这也是犬科动物闽相互嗅寻的方式;嗅觉,能给狗提供的信息比其他感觉总和还多.
狗的鼻孔大约有2亿左右的嗅觉细胞——比人多40倍.通过这些细胞,它的大脑能从100万个气体分子中筛选出1个.根据所闻而不是所见的东西,展现给狗的是一个完全不同的画面.
花对狗来讲无足轻重,所以花香对狗无关紧要.可食物是件大事,对我们来说是一个空盘子,可对一只饥肠辘辘的狗来说却散发着鸡肉的香味