The COVID-19 pandemic hit New York City neighborhoods in very different ways. Some places had more cases than others. This made it hard to plan how to help everyone equally. Most forecasts didn't look at the small details of each neighborhood. But, a recent effort changed that. It used data from mobile devices to track how people moved around the city. This included ...

The Yellow River, often called the birthplace of Chinese culture, has seen big changes in its environment. This is mostly because of fast city growth, which has led to more wastewater going into the river. This has changed how the water flows and its quality. The Dahei River, a key part of the Yellow River, has been watched closely for almost ten years. Over 20 spot...