What drives people to run a marathon? Join Hayley Birch as she tackles 26.2 miles, aided by science.
Written by Hayley Birch
Read by Kirsten Irving
Produced by Barry J Gibb
Edited by Geoff Marsh
Read the full text original and accompanying extras published on Mosaic.
For more stories visit mosaicscience.com
If you liked this story, we recommend City cycling: health vs hazard, by Lesley Evans Ogden, also available on our podcast.
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