When household batteries die, it’s hard to know what to do with them. So they get shoved into a junk drawer or sheepishly thrown into the trash. But dead batteries ...

We tested 6 sleep masks to compare their overall comfort and ability to deliver total darkness during sleep. There’s just one we recommend buying.

While 3D printing has mostly involved plastic so far, future materials, including one harder than steel, could make a huge difference in the technology.

Motorsport journalist Rob Peeters discusses Formula 1's decision to rotate Barcelona and Spa, previews the IndyCar season and recaps NASCAR's week in Daytona.