Aristotle saw an earth made mainly of matter but astronomers today see a cosmos of space and light where matter is rare. Our universe is first space, then light, and matter is a distant third in the scheme of things. In matter terms, space is nothing at all, but for a network it is a big investment, as is filling it with light, while the cost of the few specks of matter we call stars is tiny by comparison. For us, matter is primary, but in our universe, it is tertiary, after space and light. Matter is the exception not the rule, so let us revisit what still puzzles us about it today.
QR4.7.1 Matter Half-Spins
QR4.7.2 Neutrino Asymmetry
QR4.7.3 The Mass Problem
QR4.7.4 Charge Neutrality
QR4.7.5 Family Generations
QR4.7.6 Dark Matter
QR4.7.7 Dark Energy