Recently in my physics lab, students were having trouble with the difference between mass and weight. I had ready answers---it’s a topic I’ve gone over hundreds of times. But after I explained that ...

Imagine navigating a city street during rush hour—cars and bikes zipping by, pedestrians hustling down a crowded sidewalk, ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Astronomers have directly measured a blazing-bright object on the opposite side of the Milky Way, ...

Many creatures in nature, including butterflies, newts and mole rats, use Earth's inherent magnetic field lines and field intensity variations to determine their geographical position. The spatial ...

iOS: Sometimes you need to get a quick measurement of something and you probably don’t carry a ruler around, but of course, there’s an app for that. VisualRuler gives you a decent estimate of an ...

Researchers in Europe have developed a technique for obtaining accurate laser-based measurements of objects hidden behind complex scattering structures. They say that their mathematical formula, which ...