Scientists have created a new powerful "masked" cancer drug. Numerous cancer treatments are notoriously harsh on the body; they assault healthy cells simultaneously with tumor cells and result in a wide range of side effects. The Pritzker School of Molecular Engineering (PME) at the University of C

Delivering chemotherapy drugs directly to cancers could help reduce side effects, and soon that job could be done by tiny 3D-printed robotic animals. These microrobots are steered by magnets, and only release their drug payload when they encounter the acidic environment around a tumor.