The scientific journal Nature has a science fiction page, Futures, in every issue. Some of those short stories are perfect EP fodder. Last week's one, for example:
http://www.nature.com/nature/journal/v478/n7369/full/478422a.html
This actually suggests an interesting kind of library for EP: a library of delta or even beta forks of competent people.
There are plenty more in the archives.
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