Related Clues:

• Hurler's stat.
• One billion years, in astronomy
• Long stretches
• Group of eras
• Important time in history
• The Roosevelt years, e.g.
• Grows up
• Christian, for one
• Consent and Reason, e.g.
• Golden and Bronze
• Noteworthy period of history
• Koufax stat.
• Series of periods
• Period between blue moons
• Pedro Martinez stat