Colombia, Amazonas, Santa Isabel, Close view of manioc leaves a plant grown for its root which forms the basis of the Indian diet.

Colombia, Amazonas, Santa Isabel, Manioc plant. The tuba is the basis of the Macuna diet and is a high source of starch after processing.

An engraving of the self portrait by William Hogarth titled The Artist and His Pug with The Line of Beauty and Grace on the artist's palette referring to his theory that the curved serpentine line is...