In2013,twobiologistsnamedJamieVoylesandCorinneL.Richards-ZawackispentweekssloggingupanddownmountainsidesinPanama.“Wewerebug-bittenandbeatup,”recalledDr.Voyles,n
Scientistsarenowonestepclosertoresolvingahead-scratcherofwhypoisonfrogsdon'tpoisonthemselves,accordingtoanewstudyreleasedonThursdaythathaspotentialimplicationsf
Mostofthefrogsalivetodaymayowea"bigthankyou"tothemassextinctionthatwipedoutdinosaurs66millionyearsago.AnewstudybyChineseandAmericanbiologistsshowsthat88percento