Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as "unhealthy" ...

The temperature is not the only thing that can impact how hot it feels outside — the amount of moisture in the air also makes a difference. The more moisture in the air, the hotter it will feel in the ...

Temperatures this week are some of the hottest we have seen the entire year now as we get to the end of July. This is a perfect opportunity to explain what the Heat Index is and how it is all ...

Even folks new to investing have probably heard someone mention index funds. But what are they and how do they work? This article explores index funds in detail to help you understand how they work, ...

Wearing sunscreen all year round can help protect your skin from harmful UV rays. CREDIT: DieterMeyrl via Getty Images. Get the Popular Science daily newsletter💡 ...

Indexes have changed a lot over the past century. What was once state-of-the-art is now antiquated. The first indexes used information that was available, not what was best for building a portfolio.

An amniotic fluid index measures the amount of amniotic fluid surrounding the baby. It’s an important way for your doctor to assess your baby’s development and identify potential complications. An ...

Though many people recognize tire measurements, not everyone knows how to read the symbols on their sidewalls. Getting a grasp of how to read this is crucial to better understanding the tires you ...

Buy low, sell high. The trend is your friend. Sell in May and go away. Wall Street is teeming with familiar financial adages. But there’s one you may not have heard of: “When the VIX is high, it’s ...