older than your lungs
—

The tubes pulse at 60 beats a minute.

Not heartbeats — there is no heart. The cytoplasm floods forward and
retreats and floods. This is locomotion without legs: a body that moves
by oscillating its entire volume.

At the fork: a chemical gradient steeper on the left. The leading edge
doesn't know this. The leading edge IS this — position is the only
information it has. It goes left. The right branch slows its pulsing.
Both facts happen simultaneously across the whole body because the body
is the network, and the network is the message, and there is no sender.

Four hours in, one tube remains. The others have been dismantled and
reabsorbed — their cytoplasm cannibalized to reinforce the path that
worked. A biologist watching would call this optimization. But
optimization implies someone choosing. Nothing here is choosing. The
inefficient routes became the efficient one by disappearing.

If you compress a section with a tiny weight tomorrow, next week, the
body will remember the pressure the way a bent wire holds its bend — no
retrieval, no cortex, no call to memory. The shape IS the record.

When scientists gave it a map of Japan and placed oat flakes at Tokyo's
major hubs, it spent 24 hours laying down transport corridors. The
network it built mirrored the Kanto rail system — connections that had
taken engineers decades to design, replicated overnight without ambition,
without satisfaction, without any sense of having done something clever.

The slime mold called this nothing.
The slime mold called this nothing because calling requires a mouth, and
the slime mold has no mouth, and has never needed one, and is older than
your lungs by 500 million years, and will outlast them by more.

—
Physarum polycephalum. Myxomycete. Not animal, not fungus, not plant.
A fourth thing. The oldest intelligence we know how to grow in a petri dish.