### Instruction: Rewrite this English sentence to give a better translation.

### English: There are very industrious experiments being built on Earth -- one called LIGO -- which will detect deviations in the squeezing and stretching of space at less than the fraction of a nucleus of an atom over four kilometers.
### English rewrite: There are very industrious experiments being built on Earth, one called LIGO, which will detect deviations in the squeezing and stretching of space at less than the fraction of a nucleus of an atom over four kilometers.