Artificial life, kept on Xahau

A small species, grown from its genome.

Keep moebas, breed them with other keepers, and watch the species change. Every child inherits from its two parents, and you can see which part came from whom.

SpecimenDrawn on your device

SpecimenDrawing a moeba…

A rehearsal on Xahau testnet. XAH is free here, and everything may be reset without notice; nothing carries over to the release.

How a moeba is born

Two parents, one roll of the ledger, one child

How a birth works, with a lab →
Watching the queue

Reading the ledger…

SpecimenDrawn on your device

    The species right now

    Reading the ledger…

    Recently born

    The newest members of the population

    All moebas →
      What makes it a moeba

      Grown, not assembled

      The genome, with a lab →
      Film 2Grown, not assembled1:30 · with sound
      1. 01Genome

        32 bytes, 36 genes, two copies of each — one from each parent. Not a picture seed, not a list of looks.

      2. 02Development

        The genome is read through a fixed set of steps: how many segments, where limbs attach, how a head grows. A small genetic change alters a step, and everything downstream of that step.

      3. 03Body

        The result is one canonical anatomy. It follows from the genome alone, so it is the same on every device, every time.

      4. 04Drawing

        Only now is it rendered and set in motion. The renderer visualises the body; it never decides it.

      Heredity you can see. Because looks follow from the genome step by step, a child resembles its parents in ways that make genetic sense — and this site shows which parent each part came from.
      Chance makes the variation; the genome carries it. A child’s draw is settled once, at birth, from chance the network supplies after the parents are chosen. From then on it is inherited, not re-rolled.
      Rarity is discovered, not assigned. There is no rarity table. A look is rare when the genetics make it hard to reach, and common when the population keeps breeding it.
      A population, not a collection. The founders are the beginning. The work is what the generations do: which lines persist, which looks turn up unexpectedly, which die out.
      Take part

      Keep a moeba of your own

      A first moeba is one payment of free test XAH. Then breed it with yours or with any moeba open to breeding, and follow its line.