Some objects float in water and other sink. But did you know that you can change whether something floats or sinks by adding a substance to the water? Let's try it and see! Pour water into a cup until ...

But why do they float in the daytime and sink at night? A newly published paper by Dora Cano-Ramirez, a biology doctoral candidate at the University of Bristol, and her collaborators revealed that ...

Objects that are more dense than water sink, while objects that are less dense than water float. Disposal: The water used in this activity can be disposed of down the drain. If accepted locally, ...