In science, you never trust your own eyes. By using machines to do the observing we can see all kinds of things, such as X-rays and neutrinos. Those devices c

In science, you never trust your own eyes. By using machines to do the observing we can see all kinds of things, such as X-rays and neutrinos. Those devices can pick up patterns of radiation are the hallmarks of matter/anti-matter collisions. We see those signs now, faintly. It can be tracked down to various processes, such as when cosmic rays strike the atmosphere of Earth. But, even though it is seen out in the cosmos, effects are far too small. We would expect that if galaxy-sized clumps of anti-matter existed, the anti-matter hydrogen would be aglow with anti-matter radiation as it collided with hydrogen from near by matter galaxies. We can observe back to almost the beginning of time by looking into the distance. Even there, we don't see the imbalance. This suggests that something happened right at the beginning.