It has about one-third the density and stiffness of steel; it is ductile and can be easily machined. Naturally, pure aluminum reacts readily with oxygen in air creating a thin barrier oxide layer known as the aluminum oxide next to the metal surface that is about 2-3 nanometers thick.
Orange skin resulting from excessive carrot consumption sounds like something out of a science fiction novel or a bizarre comedy. However, the fact is that yellow skin pigmentation resulting from increased beta-carotene levels in the blood is a real clinical condition called carotenemia. Though carotenemia is harmless, it's easy to confuse with jaundice in young children.
The individual colours of carrots (except orange) have their own pages select the colour you wish to know more about. purple - black - white - yellow - red - Seed suppliers here. Unique properties of each colour - Carotenoid/Sugar content - Why orange carrots are orange - Factors Affecting the Colour of Carrots.