The discovery of a natural clock was so important because it allowed a more easier way to check time than to use the sun, or sigils.
The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. All rocks are made up of minerals.
These rocks change over hundreds of years in the six steps of the rock cycle: Weathering & Erosion. Igneous, sedimentary, and metamorphic rocks on the surface of the earth are constantly being broken down by wind and water. Wind carrying sand wears particles off rock like sandpaper.
The population would decrease. Since Hawks eat snakes, there would be an abundant amount of snakes meaning more snakes to eat the frogs.