Pineapple is a large tropical fruit with a spiky, tough skin and sweet insides. When European explorers came across it in South America in the 17th century, they called it a pineapple because of its ...
Keith Ayoob answers the question: 'What are Calories, Why Do They Matter?' February 1, 2009 -- Question: What is a calorie and why is it important to know how many calories there are in certain foods?