One out of every ____1____ humans lives above karst formations. Karst caves are the result of soluble rock dissolving away with the power of groundwater. Not all rocks are durable, some are easily eroded. ____2____, marble and gypsum are examples of soluble rock types that can weather away to form caves. As surface water enters […]

As sunshine gives way to clouds, a little-known process is occurring thousands of feet up in the sky. Rain is forming. All of the necessary ingredients have come together perfectly at this moment: moisture, unstable air, even dust particles. Rain is the lifeblood of Earth. We rely on it for drinking water, agriculture, and healthy […]

Wildfires are fires that are unplanned and burn out of control. They occur outside of cities, in ____1____ areas that have lots of vegetation. Causes of these blazes include lightning strikes, fireworks, and campfires, or sometimes ____2_____ – when someone purposely sets an area on fire.  Wildfires can burn wildly for days or weeks at […]