Related Clues:

• A billion years, in astronomy (Var.)
• Geologic time span
• Huge time span
• Long division?
• Vast stretch
• Forever, seemingly (var.)
• Plenty of time?
• '___ Flux' (1990s MTV series)
• ___ Flux (Charlize Theron role)
• Nearly forever
• Long geologic time division
• Nearly infinite perioD
• Part of the earth's history
• '___ Flux' (futuristic MTV cartoon)
• Crumbling as one ages