Closer to the shoulder, axolotls have higher levels of retinoic acid, and lower levels of the enzyme that breaks it down.

Axolotls are known for their ability to regrow limbs, organs and even parts of the brain and heart. But the tailed amphibian ...

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

Sea anemones may hold the key to the ancient origins of body symmetry. A study from the University of Vienna shows they use a ...