Agriculture could be defined as the manipulation of plant and animal DNA to suit the needs of humans. We have been changing the DNA of our food for 10,000 years. For most of agricultural history, we’ve had no idea what DNA changes occurred in our food. The discovery of recombinant DNA technologies in the 1970s began to change that. For the past 20 years we have been using genetic engineering (GE) to engineer precise DNA changes in our food.