It's fun to think about how we know stuff. For instance, the sun has a mass of about 2 x 10 30 kilograms. That is such an enormous mass that it's difficult to comprehend. And if it's so difficult for ...

The whole point of a dam is to store water in one place, thus preventing it from spreading across a larger surface area. That's great for hydropower, recreation, and ensuring there's enough water for ...

Deaths of nearby massive stars may have played a significant role in triggering at least two mass extinction events in Earth's history, according to new research. The explosive supernova deaths of ...