They are exceptional in that they have lipids instead of sugars or starches. The mesocarp is rich in oil. 2000-2800 calories per kg. They appear about 7000 B.C. in Mexico. They may have been independently domesticated in at least three different areas.
Some people are sensitive to the outside of the fruit.
Mangoes were taken to the New World by the Portugese and are now a major crop in many countries. See diagram pg. They also have been cultivated for thousands of years. The Spanish introduced them into the New World. They are grown for both ornamentals and fruits.