What is the difference between Dark matter and Antimatter?
They are very different things! Anti-matter has the same properties as ordinary matter except that the charges of the basic particles are flipped. For example, an electron is negatively charged, so the anti-matter particle for the electron is positively charged. It is called a positron. There are other, more subtle changes, so the anti-neutron is not the same as a neutron (although both are electrically neutral). There is a collective term for heavier particles like protons and neutrons which are made out of quarks. They are called baryons. Anti-matter is ultimately made out of quarks also, so is baryonic. Because anti-matter has charges, it interacts with light (electromagnetic waves) in essentially the same way as matter does. So, large quantities of anti-matter would be visible. Anti-carbon, for example, would have the same density as ordinary carbon and would be black (assuming it was anti-graphite). Also, anti-matter interacts very strongly with ordinary matter. So strongly, in fa
