Popcorn has existed for over five thousand years.
Why it is true
Indigenous peoples of Mexico were already cultivating and popping corn long before Europeans arrived, using it in ceremonies and as food.
Source: National Geographic
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.