Researchers have demonstrated that a genetic switch for organ regeneration exists, after restoring damaged outer ears in mice ...

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A new study reveals the key lies not in the production of a regrowth molecule, but in that molecule's controlled destruction.

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Scientists are trying to figure that out with the aid of an unexpected resource: salamanders. Research shows that the amphibians' regeneration abilities come from mechanisms that humans could also ...

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Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

Axolotls can regrow limbs. Could they one day help us do the same? A better understanding of how these amphibians grow new appendages may lead to better wound healing—or even new limbs—in humans.

Retinoic acid is important in the development of human embryos too, telling the cells where to grow a head, heads and feet, Monaghan explained.

So, when retinoic acid concentrations are off, expression of these genes is also abnormal. Resulting limbs have shortened segments, repeat sections, limited bone development, and other deformations.