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March 27, 2021 07:00 am

Watch AI Grow a Walking Caterpillar In Minecraft

sciencehabit shares a report from Science Magazine: The video in this story will be familiar to anyone who's played the 3D world-building game Minecraft. But it's not a human constructing these castles, trees, and caterpillars -- it's artificial intelligence. The algorithm takes its cue from the "Game of Life," a so-called cellular automaton. There, squares in a grid turn black or white over a series of timesteps based on how many of their neighbors are black or white. The program mimics biological development, in which cells in an embryo behave according to cues in their local environment. The scientists taught neural networks to grow single cubes into complex designs containing thousands of bricks, like the castle or tree or furnished apartment building above, and even into functional machines, like the caterpillar. And when they sliced a creation in half, it regenerated. (Normally in Minecraft, a user would have to reconstruct the object by hand.) Going forward, the researchers hope to train systems to grow not only predefined forms, but to invent designs that perform certain functions. This could include flying, allowing engineers to find solutions human designers would not have otherwise foreseen. Or tiny robots might use local interactions to assemble rescue robots or self-healing buildings. The researchers presented their system in a paper posted on arXiv.

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