Antimatter: does it matter?

What’s ordinary matter?

Everything that exists is made of matter. The people and objects you see around you, air, water, and distant galaxies, are all made of matter. “Matter” is just another way of saying “the stuff everything is made of”.

But that doesn’t really answer the question.

What is matter made of?

If we look closely at any matter, we see it’s made up of atoms, and that atoms are made of smaller particles, including protons, neutrons and electrons. The way the protons, neutrons and electrons are arranged in an atom tells us what sort of atom it is. This diagram shows an atom of carbon. A carbon atom has six protons and six neutrons in its central nucleus, and six electrons in orbit around it.

Matter exists, so antimatter must exist! >>