What Is Dust? And Where Does It All Come From?

Everything in our homes gathers dust. But what exactly is it? Where does it come from, and why does it keep coming back? Is it from outside? Is it fibers from our clothes and cells from our skin?

Human Exposure to Wildfires Has More than Doubled in Two Decades – Who is at Risk Might Surprise You

Over the past two decades, a staggering 21.8 million Americans found themselves living within 3 miles (5 kilometers) of a large wildfire. Most of those residents would have had to evacuate, and many would have been exposed to smoke and emotional trauma from the fire. This article was originally published on July 3, 2023 in the Conversation US. Authored by Mojtaba Sadegh. This article is republished from The Conversation under a Creative Commons license.