Scientists Find Evidence That Rain First Fell on Earth 4 Billion Years Ago
In elementary school, children learn about the water cycle. From evaporation to condensation into clouds to precipitation as rain, water cycles between land and sky. But when did this process begin? Earth itself is 4.5 billion years old, but freshwater was not immediately present. However, a new paper published in Nature Geoscience suggests Earth experienced its first rain earlier than previously thought.












































































