Environmental health

For most of human history, night was a period of natural darkness. The sun sank below the horizon, the stars emerged in a velvet sky, and the body followed an ancient script that had been written into our biology over millions of years. Today, however, very few of us ever experience a truly dark night. …

Mia Heller was not looking for a science fair project when she picked up her local newspaper a few years ago. She was just a teenager in Warrenton, Virginia, scanning headlines over breakfast. But one article stopped her cold. It reported that her neighborhood’s tap water was contaminated with PFAS chemicals and microplastic pollution, and …