Pointing beams of light at different parts of the slime mould means that different legs move.
To prove his contention, he and his colleagues set about building a circuit that would, like the slime mould, learn and predict future signals.
At room temperature, the slime mould moves at a slothful rate of about a centimetre per hour, but you can speed this movement up by giving the mould a blast of warm, moist air.
