🐄🍪 An Intel Fab in Arizona was seeing a sharp decline in yields when producing their chips at night.
Engineers were really puzzled why between 1 and 2AM the yields were so bad.
Turned out that at night, the direction of the wind was changing. Methane, from cow farts from nearby dairy farms, ended up in the cleanrooms via the air conditioners.
Intel didn't figure out how to solve the problem, so they just paid the three neighbouring farms to move.
CERN's LHC, a multi-billion dollar project, was put on pause because of damage to a 66kV high-voltage transformer.
The damage was caused by a weasel and took days to repair, putting the LHC operations at rest during that time.
In 2009 the LHC was taken out by what was suspected to be a bird, though no remains were found.
https://www.bbc.com/news/world-europe-36173247