Theideathatanimalscansenseearthquakesisapopularone，andstoriesaboutanimals'strangebehaviorbeforeearthquakeshavebeentoldforcenturies．Catfishmovingviolently，chickensthatstoplayingeggsandbeesleavingtheirhiveinapan

　　Theideathatanimalscansenseearthquakesisapopularone，andstoriesaboutanimals'strangebehaviorbeforeearthquakeshavebeentoldforcenturies．Catfishmovingviolently，chickensthatstoplayingeggsandbeesleavingtheirhiveinapanichavebeenreported．Countlesspetownersclaimedtohavewitnessedtheircatsanddogsactingstrangelybeforethegroundshook-barkingorwhining（哀叫）fornoreason，orshowingsignsofnervousnessandrestlessness．

　　Canhumansuseanimalsasearthquakedetectors（探测器）？Debateoverwhetherornotanimalscantrulysenseearthquakeshasnotsolvedthequestion．SupportfortheideathatanimalscansenseearthquakesincludesstudieswhichsuggestthatanimalsmaybeabletofeeltheEarthvibrate（振动）beforehumans．OtherideassuggestthatanimalsmaysenseelectricalchangesintheairorgasreleasedfromtheEarthwhichcouldbeindicators（预示）ofanearthquake．

　　However，otherresearchersthinktheanimals'abilityisverydoubtful．Somescientistsfeelthatthereisnostrongscientificevidencetosupporttheideathatanimalscansenseearthquakes．Theysaythatitisdifficulttodevelopacontrolledstudywhichcanconnectaspecificanimalbehaviorwithanearthquakeoccurrence．Theysuggestthathumanpsychologymayhaveaneffectonpetowners，astheymaywanttoattribute（归于）powersofsensingearthquakestotheiranimals．Othershavealsopointedoutthatanimalsreacttosomanythings-beinghungry，defendingtheirland，mating，enemies…Andifanearthquakecanshakemillionsofpeople，itislikelythatafewoftheirpetswill，bychance，beactingstrangelybeforeanearthquake．

　　Whetherornotanimalscansenseearthquakesbeforehumansdoremainstobeseen．

　　PhenomenonAnimals（71）___strangelybeforeearthquakes．ExamplesCatfishmoveviolently，chickensstoplayingeggsandbees（72）___theirhive．

　　Catsanddogsfeel（73）___ andrestless．Different（74）___aboutthemysterySomeresearcherssupportit．Someresearchers（75）___it．ArgumentsAnimalscanfeeltheEarth'svibration（76）___ ofhumans．

　　Animalscansenseelectricalchange