Cracking the axolotl code: How to regrow limbs and stay young

Minor cuts and scrapes usually heal in time, but losing a finger or a whole limb? For most vertebrates, that's a done deal. Unless, of course, you've got the self-healing machinery of an axolotl.

Plants know when to grow—and when to hold back, study finds

Researchers have uncovered a surprising mechanism that allows plants to carefully coordinate the formation and growth of new leaf parts. The study shows that the hormone auxin regulates different phases in organ formation ...

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