Chemotherapy can cause your hair to fall out and make you feel tired and sick. Delivering the chemo drugs inside nanoparticles could reduce these side effects by making sure the drug goes only to the cancer.

Kasper Moth-Poulsen shows off the solar collector his team used to test its liquid battery.

Researchers 3-D print a green spiral of cyanobacteria onto a mushroom. The microbes give off electrons when exposed to light. Those electrons flow into the black graphene ink to produce an electric current.

A special pen heats the blue ink on this rewritable paper. As the ink warms, it turns clear. The white paper beneath reveals a written message.