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.
Vibrant orange carrots are a healthy addition to your daily diet. They are low in calories, contain no fat and supply significant doses of certain vitamins and minerals. While they taste good on their own, carrots have a mild flavor that makes them a versatile way to boost the nutrition of many other recipes as well.