What we breathe out becomes fuel for forests. But inside our own bodies, CO₂ has a secret life. It sparks chemical reactions, shapes metabolism, and may even act as a signaling molecule—and a new tool ...

With this multipurpose health testing device, you can measure your body temperature and blood oxygen saturation, take an ECG, and listen to your heart and lungs with a pair of headphones.

The world of Outlander, one of the finest examples of a franchise done right on modern television, looks set to continue expanding its horizons following the success of the recent spin-off, Outlander: ...

The SLS wet dress rehearsal is the rocket's last major hurdle before launch. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space news, ...

One of the most important measurements we make while tuning an engine is finding out what the actual balance of air and fuel was inside the engine. It doesn’t matter if we have a carburetor, port ...

If you build engines, tune cars, or even just like mashing your foot on the throttle with conviction, you’ve probably heard the term “wideband O2 sensor” being thrown around at the track, dyno ...

This all-purpose presence sensor is a master at monitoring indoor activity and linking it to smart home features you already use. Tyler has worked on, lived with and tested all types of smart home and ...

SPOILERS: This post contains details about The Copenhagen Test, Season 1 The Copenhagen Test‘s eight-episode binge leaves a lot for viewers to digest as the show unpacks some topical issues through a ...

The tiny Tau 2 is a great and affordable back-up battery that can squeeze out enough juice to recharge the iPhone to nearly a third of its full potential while weighing next to nothing and taking up ...

Gigantic US Spy Plane Lands on a US Aircraft Carrier Millennial therapist has 1 question for boomer parents—"Respectfully, why?" After winning his first Oscar, Tom Cruise kept repeating the same ...

I live in New Jersey, one of the states that mandates inspection for all vehicles newer than 1995. My daily driver, a Jeep Cherokee, happens to be a 1996 model year with an OBD-II sensor, meaning I ...

Smartphones rely on multiple sensors—such as the accelerometer, gyroscope, compass, and proximity sensor—to power everyday features. From screen rotation and navigation apps to motion tracking and ...