North American beaver large, webbed hind feet. The unwebbed front paws are smaller, with claws. The eyes are covered by a nictitating membrane which allows the beaver to see under water. The nostrils and ears are sealed while submerged. A thick layer of fat under its skin insulates the beaver from its coldwater environment. The beaver's fur consists of long, coarse outer hairs and short, fine inner hairs (see Double coat). The fur has a range of colors, but usually is dark brown. Scent glands near the genitals secrete an oily substance known as castoreum, which the beaver uses to waterproof its fur.
Opium (perfume) Opium (perfume) Opium is an Oriental-spicy perfume created for fashion brand Yves Saint Laurent (YSL) by perfumer Jean Amic and Jean-Louis Sieuzac of Roure, first marketed in 1977. Its top notes are a mixture of fruit and spices, with mandarin orange, plum, clove, coriander and pepper, as well as bay leaf. Its floral middle notes consist predominantly jasmine, rose and Lily of the Valley, in addition to carnation, cinnamon, peach and orris root. It is underlined by the sweet woody base note containing sandalwood, cedarwood, myrrh, opopanax, labdanum, benzoin and castoreum, in addition to amber, incense, musk, patchouli, tolu and