But what's an atom made of? What is matter, really? Matter is defined as ... (More on that in a moment.) But as usual in science, there's more to the story. On human scales of mass and distance ...

What's more, the force seems to be growing stronger as the universe expands. For lack of a better name, scientists call this mysterious force dark energy. Unlike for dark matter, scientists have ...

Enter our online science lab to find out more about states of matter. Interact with the activity and see what happens when different substances change state. There are three main states of matter ...

Find out more about this state of matter. Science Trek is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV ...

Step into our online science lab and learn more about states of matter. Interact with the activity to see what happens when different substances change state. There are three main states of matter ...

How could such a tiny piece of matter have mattered so much ... Tonelli explains how science eventually found a middle ground between Democritus and Aristotle. According to modern physics ...

What’s invisible, but bigger than anything we can ... All our cosmological observations seem to suggest that normal matter we can see – the sort that makes up you, me, the planet we live ...

Analytical chemistry is the science of obtaining, processing, and communicating information about the composition and structure of matter. In other words, it is the art and science of determining what ...