WHY? is our attempt to answer all the questions every little kid asks. Have a question? Send it to why@mentalfloss.com. I bet you know that wood floats but a rock sinks. But why? Let’s look deep ...

Whether it's the cubes in your cocktail or a raft for Arctic seals, floating ice is a basic fact of nature we may take for granted. Floating ice is "such a fundamental fact of the world, it's hard to ...

Students will be able to explain that the density of a substance has to do with how heavy it is compared to the size of the object. Students will also be able to explain that density is a ...

Water can float on oil, suggest new findings defying conventional wisdom that could have important applications in cleaning up oil spills that endanger seashores and fisheries, researchers say.

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Whether your favorite water is a riffly river, a placid lake, or a local swimming hole, a float tube—also known as a belly boat—always adds to the experience. We’re not talking about those old rubber ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. A local water district is proposing an ...

COLUMBIA, S.C. — In the theme of Easter this week, we’re going to do an experiment today in which we use eggs! We’re going to talk about density, which is an important concept in science and in ...