Scientists are trying to find out how and how hard the moles dig or swim. It looks like the mole is swimming. They used couscous to see if they actually do swim and then that is where the x-ray comes in. Scientists used couscous instead of soil because the particle sizes are uniform. There was another finding that they push with only their hands but they push 40 times their body wheight. For them to pus that hard they eat meal worms, earth worms, eggs, and sunflowers.