Have you ever stopped to wonder how much stuff is orbiting around the earth? In fact, there are a ton of satellites, ...

A new mobile space surveillance radar is now active as military planners focus more ...

Researchers have developed a new kind of lidar system that simultaneously measures the location, speed and material ...

Fitness wearables can help you move more, sleep better, and stay healthy. Here's how to pick the right one for you, along with the top fitness trackers we've tested. I’m PCMag’s senior writer covering ...