So, in the future, this means we could potentially implant artificial muscles into our bodies. Another cool application would be transporting nanocargo such as drugs or even information around our bodies and in the environment. These single-molecule-sized nanocars and nanotrucks have spherical wheels, rotating axles, and a molecular chassis and can be powered by shining light or using other chemistry tricks. On a larger scale, microrockets and microsubmarines can also move around and deliver larger cargo. For example, microsubmarines could be unleashed in order to capture and remove oil in the even of massive oil spills. Both of these micromachines work by reacting with surrounding solutions to form gas bubbles that propel the microvehicles around. And they pick up and drop off cargo also using chemistry-they can pick up oil in water through hydrophobic interactions or could pick up magnetized cargo by adjusting surrounding magnetic fields.