Aquae Sulis incorporated into British legend. The thermal springs at Bath were said to have been dedicated to Minerva by the legendary King Bladud and the temple there endowed with an eternal flame. An 8th century poem in Old English, "The Ruin", describing the ruinous changes that had overtaken a Roman hot-water spring, is assumed to be a reference to Aquae Sulis. The poem was copied in the Exeter Book for transmission to future generations. Rediscovered from the 18th century onward, the city's Roman remains have become one of the city's main attractions. They may be viewed almost exclusively at the Roman
Aphanizomenon flos-aquae (dietary supplement) from the air, and water to synthesize proteins, carbohydrates, and lipids. AFA is also able to directly use molecular nitrogen from the air to produce proteins and other nitrogen-containing biomolecules. This ability is widespread in prokaryotes, but unknown in eukaryotes. "Aphanizomenon flos-aquae" as a species has both toxic and non-toxic forms. While benefits have been indicated, toxicity has been shown in some strains of the species "Aphanizomenon flos-aquae", with cylindrospermopsin and saxitoxins present, and microcystins found contaminating AFA dietary supplements. The World Health Organization's "Guidelines For Drinking Water Quality" note Anatoxin-a, saxitoxins, and cylindrospermopsins are present in the Aphanizomenon genus.