Someanimalspantandsweattospeedevaporationofbodymoistureandthuscoolthemselves.
In1974HenryAaronbrokeBabeRuth'smonumentallifetimerecordof714homeruns.
Themegaphone(microphone)makesthevoicesoundlouderbecauseitpointssoundwavesinonedirectionandkeepsthemfromspreadingoutinalldirections.
Someseaurchins海胆havevenomous(toxin)spines
Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.