Anyone driving toward the sun during their commute knows this time of year is particularly difficult, with the glare from the sun coming straight into your eyes. In the early fall, around the equinox, ...

There’s no such thing as a complete vacuum. Even in the cosmic void between galaxies, there’s an estimated density of about one hydrogen or helium atom per cubic meter. But these estimates are largely ...

In a world of increasing wildfires and invisible irritants, we consulted with experts to explain why and how to measure air quality in your home and take steps to correct it. By Terri Williams ...