And sure enough, in 2009, at around the 36 kilometre point of the Beijing Marathon I experienced what runners call 'hitting the wall' – which is about as unpleasant as it sounds.

对此我深有体会。 在2009年北京马拉松赛中，我在大约36公里处遭遇了运动员所说的“碰壁”经历，苦不堪言。

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The current rover location, a small depression known as "Yellowknife Bay", lies about half a kilometre from the point where Curiosity touched down.

BBC: Curiosity breaks rock to reveal dazzling white interior

Sgt Paul McMellon told the hearing he was on a control point about a kilometre away from the minefield when the tragedy happened.

BBC: Para hit as craft tried to land

They lie in a small depression referred to as Yellowknife Bay, about half a kilometre from the robot's point of touchdown last year.

BBC: Curiosity Mars rover takes historic drill sample