Question:
About a billion years
Similar Crossword Questions:
- Billion years
- A billion years, to geologists
- One billion years, geologically
- A billion years (Var.)
- One billion years, in geologic time
- One billion years to Hubble
- One billion years, in geology
- Billion years (Var.)
- One billion years (Var.)
- Billion years, to a geologist
- A billion years, in geology
- A billion years
- Division of about one billion years
- One billion years, in astronomy
- A billion years, in astronomy (Var.)
- Billion years, easily
- A billion years, in astronomy
- One billion years
- A billion years, to Hubble
- A billion years, geologically
- "Gosh," years ago
- The Clinton years, e.g.
- Home to 1.1 billion
- Inst. 100 years old
- Someone wise beyond their years