Paul Edward Stamets (born July 17, 1955) is an American mycologist and entrepreneur who sells various mushroom products through his company. He is an author and advocate of medicinal fungi and mycoremediation.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/people/p/paul-stamets/wikipedia/en.wikipedia.org.md
A football field is often used as a comparative measurement of length when talking about distances that may be hard to comprehend when stated in terms of standard units.