Measuring regrowth: Erk gradients guide zebrafish fins back to their original size after injury
In a new Nature Physics study, researchers found that fin regrowth in zebrafish is driven by a brief burst of growth signal at the fin tip, sized to the amount lost, which sets up gradients of Erk activity that guide the regrowth.
We haven't written up this one. Phys.org has the full story — the link below goes straight to it.