Summary

Randall poses five "unanswerable" questions within the realm of physics, and provides a background that suggests possible answers:

Why is there something rather than nothing in the universe? She notes that the question really is, why is there not an equal amount of matter and antimatter? Antimatter is not dark matter but carries the same types of changes as matter. Unlike dark matter, antimatter interacts with light. However, because of an asymmetry there is slightly more matter than antimatter which is why there is something rather than nothing.

What exactly happened during the "big bang?" Although the term has been in circulation for decades, no one knows what happened in the big bang according to Randall. The only possible approach to an answer could most likely be found in a theory of quantum gravity. Quantum mechanics and gravity are important...