Hearing Aids Are Now Available Over the Counter. What to Know Before Buying One

On Oct. 17, hearing aids approved by the U.S. Food and Drug Administration (FDA) became available over the counter for the first time, for potentially thousands of dollars…

How NASA’s Mars Helicopter Flight Opens the Door

Mars is a lousy place to try to fly a helicopter. There’s the temperature, for one thing—a paralyzing -90º C (-130º F), frigid enough to cause nearly any…

Meet the All-Civilian Crew of Inspiration4

TIME Studios is producing the Netflix documentary series Countdown: Inspiration 4 Mission to Space, starting Sept. 6. Astronauts are accustomed to celebrity status, and Jared Isaacman, 38, is…

Taking 4,000 Steps a Day Improves Health

Walking just 4,000 steps per day—less than half of the 10,000 steps often recommended for maintaining an active lifestyle—may be enough to help extend your life, according to…