Interplanetary running – a 10k with a science spin

At the Run the Solar System 10k, runners started at the Sun and ran out to Neptune, passing planets at distances relative to their real positions. It was fun and surprisingly satisfyingThe minds of Nasa engineers and sci-fi writers have spent decades dreaming up ways of crossing the vastness of outer space: ion thrusters, warp drives, gravitational slingshots, the Infinite Improbability Drive and dozens more. The list is already so long that it seems unlikely humanity needs to add to it any time