The hardest bit about an atomic physics course is finding the energy to open the books.
Anyway, back to the discussion about the inside of an atom. All of a sudden we see that 0.0000000000001% of everything is actually nothing. (Keep up), Therefore all matter, and anti-matter can be compressed to that percentage of its currently perceived size. However, this fact means that London, being about 40 miles across, could now be compressed into a circle that is a mere 6.4x10 to the -11 meters. That's a thousand thousand times smaller than the diameter of a human hair. The whole of planet earth would be compressed into a sphere that is 1/10 the diameter of human hair, providing that the original quote was correct. You think that's mind boggling? Wait. This tiny speck would still weigh the same as the whole earth.
All of a sudden, the concept of a singularity and a big bang don't seem too unusual.