Newt
Newts, as with salamanders in general and other amphibians, serve as bioindicators because of their thin, sensitive skin and evidence of their presence (or absence) can serve as an indicator of the health of the environment. Most species are highly sensitive to subtle changes in the pH level of the streams and lakes where they live. Because their skin is permeable to water, they absorb oxygen and other substances they need through their skin. Scientists study the stability of the amphibian population when studying the water quality of a particular body of water.
War with the Newts
War with the Newts (Válka s mloky in the original Czech), also translated as War with the Salamanders, is a 1936 satirical science fiction novel by Czech author Karel Čapek. It concerns the discovery in the Pacific of a sea-dwelling race, an intelligent breed of newts, who are initially enslaved and exploited. They acquire human knowledge and rebel, leading to a global war for supremacy. There are obvious similarities to Čapek's earlier "R.U.R.", but also some original themes.