Toxicology experiments on nanomaterials often seem to run the same way: put some nanoparticles, carbon nanotubes, quantum dots, or other kind of nanosized structures in a petri dish, water column, soil sample, or lab test tube of choice. Then expose daphnids, microbes, zebrafish, pig lung cells, human skin cells, or other model organisms to the new and exciting materials. Sit back and see what happens.