One researchers has preferred to classify Kimberella among the Ediacaran “fossil problematica.”
But what about tracks of the moving animal? There are indeed some fossils from the White Sea.
The body fossils are generally positioned at the focal points of the fan-shaped scratch marks.
An anthropologist writes that the evolution of bipedal-walking primates was primarily caused by the shifting of select bones and muscles in the pelvis.
Fossils often leave much room for very different interpretations of relatively poor evidence.