There is a real-life monster that lives underwater, able to regenerate its limbs and which is always young. This is the amphibian known as the axolotl, and it is… Mexican! In this fascinating conversation together with José María Herrera Marquina, the Mexican biologist and writer Andrés Cota Hiriart will tell us anecdotes, curiosities and surprising information about this small and mysterious animal that always seems to be smiling.