Japanese researchers have succeeded in producing see-through frogs; letting them observe organs, blood vessels and eggs under the skin without performing dissections.
The lead researcher is Masayuki Sumida, professor at the Institute for Amphibian Biology of state-run Hiroshima University.
He says one can watch organs of the same frog over its entire life without having to dissect it.
The researcher can also observe how toxins affect bones, livers and other organs at lower costs.
Dissections have become increasingly controversial in much of the world particularly in schools where animal rights activists have pressed for humane alternatives such as using computer simulations.