1) The document describes a conceptual journey through scales of size from 1 meter to billions of light years and back down to the subatomic scale. 2) It starts at 1 meter and increases in size by factors of 10 up to billions of light years, observing planets, stars, galaxies, and the limits of the observable universe. 3) The journey then returns back to the starting point of 1 meter and decreases in size down to the subatomic level of quarks and femtometers, observing cells, DNA, atoms, and subatomic particles.