Lipids, a chemical family that includes cholesterol and fat, make up a major part of the average human diet. At 9 calories per gram -- compared to 4 calories per gram of carbohydrates and proteins -- fats serve as concentrated sources of energy to fuel your active lifestyle.
The Development of Rowing Equipment By Bill Miller This page contains information about the development of rowing equipment beginning about the end of the 18th century.
Quick Answer. The first boats are believed to have been built by the prehistoric hominid species, Homo erectus. The oldest boat to be recovered archaeologically is the Pesse dugout canoe from Holland dated to approximately 8,000 B.C. Keep Learning.