The Forum for Negative Results is a journal for publishing papers about hypotheses which turned out to be irretreviably wrong.
This is important because most publications have a bias towards publishing papers which prove hypotheses, so a lot of valuable information about what didn't work gets lost.
The link includes a list of negative results journals in other fields.
All Results Journals is an additional bunch of nothing-under-the-rug journals for various fields.
Links thanks to Morendil and Kyrie, respectively.
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