Long stretches
Else clues• Ages
• Big times
• Distinct periods of history
• Distinctive eras
• Distinctive periods
• Eocene and Miocene
• Eocene and Miocene, e.g.
• Eocene et al.
• Eras
• Geologic periods
• Geologic time divisions
• Geologic time periods
• Geological period divisions
• Historical periods
• Lengthy periods
• Lengthy time periods
• Long times
• Long, long periods
• Memorable dates
• Memorable times
• Miocene and Pliocene
• Noteworthy periods
• Noteworthy periods of history
• Origins of eras
• Period pieces
• Periods
• Periods of history
• Pleistocene and Eocene, for two
• Pleistocene and Miocene
• Pliocen and Eocene, e.g.
• The Miocene and Pliocene
• They last a long time
• They make up periods
• They're shorter than periods
• Time pieces
• Times to remember
• Years and years