"About 2.1 billion years ago, a blob-like creature inched along on an early Earth. As the organism moved, it carved out tunnels, which may be the earliest evidence of a moving critter on the planet.
Until this discovery, the earliest evidence of motility — that is, an organism's ability to move independently using its own metabolic energy — dated to about 570 million years ago, according to fossils from different locations. That's a good 1.5 billion years younger than the new finding.
Whatever left the teeny, tiny tunnels was likely a cluster of single cells that joined ranks to form a slug-like multicellular organism.........
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But not everyone thinks these tunnels represent the oldest proof of motility." foxnews.com/science/this-2-1-billion-year-old-fossil-may-be-evidence-of-earliest-moving-life-form [foxnews.com]
Looks like a slug or blob, digs tunnels. Could it be.......EL CHAPO?