IV and cellular fluids power flexible batteries

Researchers have engineered bendable batteries that can run on body-inspired liquids such as normal IV saline solution and cell-culture medium. The authors designed alternatives to lithium-ion batteries by focusing on the mechanical-stress demands of wearable...

Jackdaws flap their wings to save energy

For the first time, researchers have observed that birds that fly actively and flap their wings save energy. Biologists have now shown that jackdaws minimize their energy consumption when they lift off and fly, because the feathers on their wing tips create several...