Xuthus

Inspired by the enhanced visual system of the Papilio xuthus butterfly, a team of researchers have developed an imaging sensor capable of "seeing" into the UV range inaccessible to human eyes.

In particular, the Papilio xuthus, a yellow, Asian swallowtail butterfly, has not only blue, green and red, but also violet, ultraviolet and broadband receptors.

This man, Xuthus by name, was a Greek, to be sure, but he did not belong to Athens or to Attica, and he was considered a stranger and an alien, and as such was so looked down on that when he and Creüsa had no children the Athenians did not think it a misfortune.

As the two stood looking at each other Xuthus entered, triumph in his face and bearing.

But Xuthus managed to enfold him, to his great discomfort.