ThedreamofsendinghumanstoMarsiscloserthaneverbefore.Infact,manyscientiststhinkthatthefirstpersontosetfootontheRedPlanetisalivetoday.Butwhereshouldthefirstexplorersvisitwhentheygetthere?Horizonhasgatheredtheworld'sleadingexpertsonMarsandaskedthem:wherewouldtheygo,iftheygotthechance-andwhatwouldtheyne...
