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.
If you buy non-organic carrots, it's healthier to take the time to peel the skin before cooking the vegetable or eating it raw. When carrots are treated with pesticides as they grow, the peel holds the majority of the chemical. If you'd rather not peel your carrots, take time to wash them thoroughly with hot water. An alternative approach is to dilute some vinegar or a combination of lemon juice and salt in hot water before washing the carrots.