The beginnings of agriculture changed human history and has fascinated scientists for centuries. Planting seeds helped them grow different types of plants which could be eaten by them. Any selective breeding of vegetables by early farmers would have acted on the leaves, stems or roots that were eaten as food, but should not have directly affected seed size. Fire was used in forming tools to be used for hunting and cutting meat. Hominids found that large fires had their uses as well. By starting wildfires, they were able to increase land fertility and clear large amounts of bushes and trees to make hunting easier.