Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

Researchers at the École Polytechnique Fédérale de Lausanne (EPFL) and Kyoto University have formulated a hydrogen-rich ...

Matter is the "stuff" that makes up the universe. Everything that has mass is matter. In normal everyday life we come across matter in three states, solid, liquid and gas.

Water’s just plain old water, right? Not when you trap it inside a tiny channel, it seems, because then it behaves like no other solid, liquid or gas.

Key Concepts In a gas, the particles (atoms and molecules) have weak attractions for one another. They are able to move freely past each other with little interaction between them. The particles of a ...

From these measurements, they characterized the phase of the molecules and were able to reproduce the transitions between gas, liquid, and solid, that was expected.

Chemically, substances are classified into three types, solids, liquids and gases, but if it is said to classify a swinging fire as one of these three, you should be troubled by the answer. What ...