Oranges have been a staple of eating healthy for thousands of years, and the fruit probably originated somewhere in Southeast Asia. Historical records of oranges date back as far as China, more than 4,500 years ago. It is one of the most popular citrus fruits, and its scientific name is Citrus sinensis. There are a number of different orange varieties, but this is the sweet orange, the most popular and commonly eaten variety. This provides some of the most delicious types of orange juice, although there are some people who prefer the juice from blood oranges, mandarin oranges, or even bitter oranges.