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Dr. Dacke found that the beetles seem to keep themselves rolling straight by confirming that the intragalactic scene they were heading toward still matched the earlier reference image.

Unraveling the finer details of dark matter’s intragalactic prevalence could lift the curtain on how exactly the Milky Way itself first came to be, which could in turn test researchers’ best models of galaxy formation and evolution.

Dai says the study opens up the new field of studying starless planets beyond our galaxy, and could help us compare free extragalactic exoplanets with their intragalactic counterparts.