In a classic experiment by Vilem Laufberger in Germany, hormone injections persuaded an axolotl to grow into a fully adult salamander of a species that no one had ever seen. More famously in the English-speaking world, Julian Huxley later repeated the experiment, not knowing it had already been done. In the evolution of axolotl, the adult stage had been chopped off the end of the life cycle. Under the influence of experimentally injected hormone, the axolotl finally grew up, and an adult salamander was recreated, persumably never before seen.
Richard Dawkins, The Ancestor's Tale, p98
axolotl huxley [google search]
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