- NATURE
- Basic trait
- Temperament
- Word before walk or worship
- Emerson work
- Complexion
- Conservationist's concern
- Mother __
- David Suzuki's "The ___ of Things"
- John Muir's interest
- Science periodical since 1869
- Sierra Club concern
- One may commune with it
- One side of a behavioral debate
- Human or Mother follower
- Kind, or kind of worship
- Sunday PBS staple
- Animal Planet subject
- PBS documentary show
- Essence
- Basic temperament
- Mother of note
- World of the great outdoors
- Thing that calls when you have to pee
- You can't fool Mother___
- Mother ____
- Everyone's Mother
- Mother ___
- Noted Mother
- Mountains, trees, rivers, etc.
- Powerful Mother
- Human __
- Simple life some strive to get back to
- The great outdoors
- Inherent character
- Disposition
- Science journal since 1869
- __ versus nurture
- Basic qualities
- Inherent quality
- Basic quality
- Character
- Ubiquitous Mother
- Mountains, trees, etc.
- What many people go back to
- Certain Mother's milieu
- Fundamental quality
- Innate character.
- Mother of man or beast.
- Type.
- It "abhors a vacuum," according to Spinoza
- You need to go when it calls
- The universe.
- ___ Boy.
- Mother of flora and fauna.
- Thoreau's subject.
- Inspiration for the poet.
- Great outdoors.
- ___ study.
- All creation.
- Basic character.
- Essential character.
- General character.
- Thoreau's inspiration.
- Human item
- Fauna and flora
- See 36 Across
- Second or human
- Person's characteristic disposition
- Vacuum abhorrer
- What Adamites go back to
- Cause of an act of God
- Emerson topic
- Mother who can be cruel
- Mother _____
- Word with mother or human
- Longtime PBS series
- First published work by 39-Down
- Mother that can't be fooled
- ___ does nothing without purpose: Aristotle
- Kind of walk
- Word with "second" or "laws of"
- ___ never deceives us; it is always we who deceive ourselves: Rousseau
- Word with human or Mother
- Word after "force of" or "freak of"
- Word after human or second
- She understands her business better than we do, per Montaigne
- It is "full of genius, full of the divinity," per Henry David Thoreau
- Major science journal
- All ___ is but art, unknown to thee: Alexander Pope
- Deeply ingrained habit
- See 52-Down
- Hike milieu
- A hiker may commune with it
- James Brown: "___ Boy"
- PBS series
- Mother Earth
- Planet Earth subject
- Earth mother
- Kind of study or trail
- Mother who can't be fooled
- Word with "second" or "human"
- Type of trail
- Outdoorsman's love
- Word with "human" or "second"
- The outdoors
- Persona, according to Jung
- One may commune with it at times
- Nurture's counterpart
- Word after "second" or "human"
- Earth's "Mother"
- Scientific journal in which the existence of neutrons was first proposed
- Word after "Mother" or "human"
- ___ versus nurture
- All outdoors
- What's found in some preserves?
- Won't somebody please think of the children?! speaker Lovejoy on "The Simpsons"
- Formidable Mother
- PBS series since 1982
- World Wildlife Fund concern
- Scientific journal since 1869
- Thoreau topic
- The source of all true knowledge, per Leonardo
- It's "loved by what is best in us," according to Emerson
