On x86-64, there are two CPU settings which control the kernel’s ability to access memory. They are enforced by the memory management unit (MMU).
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A 240x135 grid of 64 instruction-length Brainfuck-like programs are randomly initialized. Every iteration, neighboring programs are randomly paired, have their instruction tapes concattenated together, and are run for a maximum of $2^{13}$ steps. Once execution completes, the tapes are split back apart. The instructions are such that they can loop and mutate the instruction tapes (programs) themselves. As found in the paper, self-replicating programs that copy themselves over their neighbor's tape often spontaneously emerge, which soon spread to take over the entire grid.
Фото: Евгений Биятов / РИА Новости