Related Clues:

• Make-up on both sides of national treasure
• 'She understands her business better than we do,' per Montaigne
• 'The elements,' so to speak
• Is not opening with key for true-blue character?
• An upright and stylishly true character
• It is 'full of genius, full of the divinity,' per Henry David Thoreau
• Something one can do without thinking
• Science periodical since 1869
• It abhors a vacuum, according to Aristotle
• Unspoilt countryside turning brown over river
• Not the first answer is true? Wrong, in essence!
• Disposition; temper
• What many people go back to
• Word with "human" or "second"
• Major science journal