These discoveries from K2 provide a snapshot of planet formation and evolution in cluster environments and thus make excellent laboratories to test differences between field - star and cluster planet populations. (arxiv.org)
As well as developing excellent laboratory techniques, you gain specific knowledge in the traditional fields of chemistry. (prospects.ac.uk)
Dwarf galaxies have so much dark matter compared to their stars, they're excellent laboratories for dark matter. (quantamagazine.org)