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13 October 2026
Imagine losing a leg and growing a new one—not a substitute, not a crude copy, but a functioning limb with bones, muscles, nerves and skin.
The axolotl, a salamander native to Mexico, can do something remarkably close to that.
When it loses a limb, the wound does not simply close over and leave a permanent stump. Cells near the injury take part in a carefully coordinated process that rebuilds the missing structures. Researchers study how the animal’s tissues know what to replace and how to restore the limb’s organisation.
The axolotl can also regenerate other body parts, including portions of its tail and certain damaged tissues. Its abilities have made it an important subject in research on regeneration.
Of course, this does not mean that humans can grow back an arm or leg. Our bodies have much more limited regenerative abilities, and scientists are still working to understand the mechanisms involved.
But the animal raises an extraordinary question: what determines whether an injury leaves a permanent scar or becomes the beginning of something new?
The answer is not simple. It involves signals between cells, the organisation of tissues and the way a developing body knows what belongs where.
For such a small creature, the questions it presents to science are enormous.
The axolotl is not trying to teach us a lesson. It is simply surviving in the way its biology allows.
Yet it reminds us how much remains to be discovered about the living world—even about something as familiar as the body’s ability to heal.
Rajat Chandra Sarmah, Guwahati, Assam, India, Instagram @rajatchandrasarmah, YouTube: conversewithasmile, email rajatchandrasarmah@gmail.com
