Related Clues:
- Interminable wait
- Immense stretches of time
- Divisions of geological time
- Geological eras
- Really big stretch
- A thousand million years
- Very long spell
- Extended stretch
- Like, forever
- 365 billion days
- Peaks form over them
- Billion years, in astronomy
- Period of unspecified duration
- Length of a long wait, in hyperbole
- Is ages covering up surveillance on site