How to run a marathon in space
by Sarah Marsh from on (#1BD7P)
On Sunday, astronaut Tim Peake will take on the London Marathon course - just some miles above it. But what are the challenges of running in a weightless environment?
As if going into space wasn't enough of a challenge, British astronaut Tim Peake is now taking part in a marathon up there, to coincide with the London Marathon this weekend. So how on earth (or not) do you actually run a whopping 26.2 miles in a weightless environment?
Related: Rocket man: the astronaut who plans to run the marathon in space
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