Only time will tell if he will be a benign caretaker, or a monster that destroys life and with it himself. But there are clues, and here I will examine what Homni is, and what he means for our species, the planet and the rest of life on Earth. Crowd power To understand Homni, let me first take you down into the soil to consider one of the most simple and ancient single-celled organisms, an amoeba called a slime mould. It evolved some 600 million years ago, and occupies soils across the world, from Antarctica to the Arctic. For most of its life-cycle, the cell lives the unexceptional life of most amoeba. But sometimes, these single cells gather in their thousands to create an organism, encased in its own slime, that can creep, crawl, pulsate, grow tentacles and even negotiate a maze.