Summary:

- Researchers at Stanford University have developed a new tool called Sandai that can scan individual sand grains and analyze their chemical and mineralogical composition.
- Sandai provides a powerful tool for studying the history and origin of sand, which can reveal insights into past climates, geological processes, and human activity over time.
- By analyzing the properties of sand grains, Sandai can help scientists better understand the movement of sediments, the formation of landscapes, and the impact of human activities on the environment.