Surface runoff is a term used to describe when soil is infiltrated to full capacity and excess water, from rain, snowmelt, or other sources flow over the land. This is a major component of the water cycle or the hydrological cycle.
It will rain next. The moist air has lots of gas water. And when the warm gas water meets the cool temperature in the atmosphere, it will become liquid water. And when liquid water becomes more and more, it will form rain.
Similar DNA may support "common" ancestry. ☺
