My “unicorn” Volvo V90 plug-in hybrid wagon is almost four years old. Here’s how healthy its high-voltage battery is.

Sensory overload is often about uncertainty and how long the brain has to stay engaged—especially in autism and ADHD.

Discover how to assess a company's liquidity through working capital and the cash conversion cycle. Understand key metrics ...

When the lights go out in winter, you are not thinking in abstract kilowatts, you are thinking about food spoiling and rooms turning cold. Running a fridge and a heater from backup power is absolutely ...

As of December 2025, there is no approved fourth federal stimulus check. Former President Donald Trump has proposed a new round of payments, but this has not been approved by Congress. Arizona has ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Check your blood sugar first thing in the morning after eight or more hours without food. Testing after meals shows how your body handles the food you've eaten. Check before and after exercise to see ...