Really weird science
We aren’t sure what all of those tiny balls on her dress and his jacket are meant to be, to be honest. They might be pop rocks or something similar, or they could represent the cells in our bodies.
We don’t know, and they don’t either. The idea is that this twin ensemble looks amazing. We don’t believe the backdrop behind them was tampered with; rather, it most likely changed into that after they put on those outfits.