The Watt Balance is one of the most precise instruments ever created - a device that measures mass using electromagnetic forces instead of gravity. This video breaks down its design, components, and ...

In nature, the behavior of systems—whether large or small—is always governed by a few fundamental principles. For instance, ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

For millions of years, a fragment of ice and dust drifted between the stars—like a sealed bottle cast into the cosmic ocean.