Solids, liquids and gases. In a solid like this brick, the particles are regularly arranged touching their neighbours and move only by vibrating. This explains why solids have a fixed shape. In a ...

A study led by researchers from the University of Turku in Finland has discovered phosphorus and fluorine in solid dust particles that were collected from a comet. Scientists on the project say that ...

When we take a look at some of the greatest unsolved problems in theoretical physics today, there's something many of them have in common. According to the known particles and interactions, there ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. The Universe, at a fundamental level, is made up of just a few ...

They flow and completely fill their container The particles can move quickly in all directions They can be compressed or squashed The particles are far apart and have space to move into Imagine a gas ...

It is often claimed that the Ancient Greeks were the first to identify objects that have no size, yet are able to build up the world around us through their interactions. And as we are able to observe ...