US scientists have developed a living smart watch.

In order for them to work, they will have to be fed regularly. Inside is the slime mold Physarum polycephalum, which conducts electricity perfectly, but is too small to complete the circuit - in order for the device to perform its functions, the slime mold will have to be regularly fed and watered. In this way, scientists want to instill sympathy for smart watches so that users do not throw them away when they get bored with them.