text: Yo, check it out, this experiment went down
  In the lab, we got the lowdown, no frown
  A non-reactive tracer, we used to flow
  Time Domain Diffusion method, let's go
  
  We tracked them particles, rapid and slick
  Simulating diffusion, pore-scale, real quick
  Porosity and mineral maps, superimposed
  Computing grids, diffusion pathways exposed
  
  Palmottu granite sample, that's what we chose
  Connected pore space, cracks and minerals it shows
  Above percolation threshold, it's the deal
  Let me break it down, here's what we reveal
  
  First result, we fitted with one coefficient
  Mean square residual, R, didn't make a dent
  But with two coefficients, cracks and minerals in sight
  Best fit we achieved, R's now out of sight
  
  No more local apparent diffusion on its own
  We applied Archie's relationship, now it's known
  D(a) equals D(0) times G, that's what we say
  G's the geometry factor, remember it, okay?
  
  Each pixel on the grid, we did the math
  No more independent D(a), we followed Archie's path
  And the coefficients we found, they're all legit
  Microcracks at m equals zero, minerals at m equals one point eight two, that's it
  
  So there you have it, the results we found
  Rappin' 'bout science, we holdin' it down
  Out-diffusion experiment, we made it fly
  Using rap style, keepin' it real, that's no lie