Fast-forwardingtomoderntimes,theheydayofthehuman-poweredflightisfarfromover.Lucrativeprizesstillaboundforrotor-drivencraft,whilstexperimentalversionsofhelicoptersandornithopters(flyingmachineswithflapping,bird-likewings)arebothonthedrawingboardandleapingoffitwithgreatabandon.Thedreamofhuman-poweredflighthasbeenanofficialrealitynowformorethan50years,butthelimitsoftheiringenuityareboundless–especiallywheninventorsandengineersarespurredonbyprizesaslargeasthe$250,000onofferfromtheAmericanHelicopterSociety’sIgorSikorskyPrizeFund.Andwhoknows,perhapsonedayhiscommutetoworkwilltakeplacenotonabicyclebutonabicycle-poweredcraft.Doesyourofficehavealandingpadontherooforarunwaynearby?Thedaywhenshedoesmightjustbecloserthantheythink!