The Martian on course for a Gravity-defying record at US box office

Ridley Scott’s film eyeing all-time October box-office opening mark set by Alfonso Cuarón’s 2013 sci-fi thriller, but Robert Zemeckis’ The Walk stumbles on Imax-focused limited releaseRidley Scott space thriller The Martian scored a stellar $55m to top the US box office on its debut this weekend.The impressive figures could yet see the critically acclaimed film overtake October record-holder Gravity when final figures are in: on estimates based on its Friday showing, Sco