Salamanders regenerate limbs, jaws, eyes, tails, and ovaries.

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• Salamander limb regeneration exhibits precise morphological target-seekingfinding0.848
  Salamander limbs regenerate missing parts precisely and stop when target morphology is reached, demonstrating goal-directed morphogenesis.
• Salamander limb regenerationconcept0.832
  Biological example of anatomical homeostasis: amputated limb regrows and knows when to stop, demonstrating error-minimization and setpoint-seeking behavior.
• Tails transplanted to salamander flank gradually remodel into limb-like structures.finding0.804
  Farinella-Ferruzza 1956 finding on global pattern overriding local identity.
• Amphibian limb regeneration ceases after repeated amputation (Bryant et al. 2017).finding0.772
  Indicates that prior experience can alter morphogenetic capacity.
• Planarian fragments regenerate with near 100% fidelity of anatomical structurefinding0.732
  Planarians cut into pieces regenerate precisely what is missing and re-scale tissue to form complete worms.
• Trained planarian flatworms regenerating new heads retain memory of learned behaviors, with behavioral engrams imprinted on newly formed brain tissue.finding0.718
  Evidence that memory and anatomical form are tightly linked; information processing enables integration of behavioral and morphological change.
• Artificially induced frog leg regeneration follows a non-developmental path (like a plant) to produce a normal limb.finding0.715
  Frog legs regenerated after specific induction did not form a paddle with interdigital apoptosis but grew digits from a central core, reaching correct final form via atypical intermediate states.
• Planarian fragments regenerating from bioelectrically re-patterned tissue produce permanent two-headed phenotype, demonstrating transient bioelectric states can produce lasting morphological memory changes.finding0.709
  Key evidence that morphogenetic memories are stored in bioelectric circuits and are rewritable via transient voltage state modifications; memory persists across multiple regeneration cycles.