[ad_1] The bots are only 2mm (about 0.08in) long and weigh just 5mg (less than 0.0002oz), but they can move relatively briskly at about 8mm (just over 0.31in) per second. They’re flexible, too. The actuators are made out of lead zirconate titanate that can turn voltage into vibration for movement, or the reverse if they […]