Forthousandsofyears,peoplehaveacceptedchallengesindifferentfields.Therearenotonlyphysicalchallenges,butalsosocialandintellectualchallenges.Somepeoplerisktheirlivesinplayingsportstoseehowwelltheycando.Otherstrytomakeandinventsomethingtomakelifeeasier.Theyallenjoychallenges.
Whydopeopleenjoythesechallenges?Thereareprobablymanyreasons.Oneiscuriosity.Theotheristhepersonalfeelingofsuccess,ofachievement,andnowadays,forsomepeople,itisabusiness.
Today,westillhavemanychallengersbeforeus.Medicalsciencefacesthechallengesofconqueringmanydiseaseswhichstillattackhumanbeings.Engineersandplannersmustbuildnewcities,designandproducenewkindsoftransportation.Scientistsmustdevelopnewformsofenergy.Inshort,weliveinanageofchallenges.