Chinese scientists have developed what they say is the world’s smallest wearable mini brain monitor that can track the activity of thousands of neurons at the same time. Weighing in at one gram (0.35 oz), the wireless “Airscope” is the lightest device of its kind and enables researchers to track a wider range of brain activity in untethered laboratory animals. The device was jointly developed by scientists from Tsinghua University and the Chinese PLA Medical School, and detailed in a paper...