Keeping Track of Your Subatomic Particles
Mike Siekkinen writes "For those that have ever wondered how many different subatomic particles are currently classified, here is your answer. It provides a well organized Flash chart of fundamental particles and interactions, as well as printable JPEGs and PDFs. Now you can keep your fermions and your bosons straight. The site also has another chart depicting the history of the universe, highlighting the evolution of the subatomic world."
One thing not obvious in the chart is that quarks have not actually been observed yet. This is extremely odd, as any particle with a charge of 0x1 or -1x0 should stand out incredibly well among all of the other particles. The quark model happens to be very convenient, and it accuratly models everything we know about the other subatomic particles; but it has never been experimentally observed.