After mapping a person’s head shape, a microjet printer sprays electronic-tattoo ink onto precise spots on a volunteer’s scalp (shown here at four times actual speed). The ink can pick up electrical signals from the brain about as well as standard electrodes but without some of the drawbacks, a new study reports.
Read more: https://www.sciencenews.org/article/vampire-bats-treadmills-metabolism
Video: Nanshu Lu
