Nearly a thousand years ago, a famous king created a famous book, later given the title "Domesday" (pronounced "doomsday").
It is magnificently quiet at the rim of the lunar crater. Nearly 400 000 km away from Earth, the silence and vastness of the unknown terrain can be overwhelming. Yet our moonwalker does not feel alone.
When we think of retirement, we usually conjure images of silver-haired folks playing golf, going on long vacations or taking daytime naps as a reward for a lifetime of work.