In the 1850s, in Brazil, a tree growing in a monastery garden was making very odd fruit. Inside each orange skin there was a large orange with no seeds. At the bottom of the orange were smaller sections that looked like a smaller squashed orange inside the same skin, which was really the bigger orange's twin. The little orange made a strange bump at the bottom of the orange skin, that looked just like a human navel or belly button. These oranges were named "Navel Oranges". They tasted very sweet, they had no seeds and they peeled quite easily. This made them a very good orange to grow commercially. But they could not grow from seed. They could only grow from plant cuttings. Nowadays, thousands of these orange trees have been planted from cuttings. "Navel Oranges" are grown in California and exported to many countries of the world. Every navel orange in the world has the same genetic make up as the oranges on that tree in the monastery in Brazil.