Scientists discover secret of limb regeneration: It's a genetic trick using acid from vitamin A

Scientists discover secret of limb regeneration: It's a genetic trick using acid from vitamin A | Mail Online: "Scientists have finally discovered how some animals can regenerate amputated limbs or damaged organs after three decades of research.

It was previously known that some species used a special acid to re-grow parts of their body, but no-one was sure exactly how it worked.

Now a team of researchers from the University of Konstanz in southern Germany claim they have solved the riddle after studying a master in the art of limb regeneration - the zebrafish."