Findings:

• Wintergreen: An Earth Quest
• The Earth's moons
• Kamandi, the Last Boy on Earth
• Return to the Centre of the Earth
• the curvature of the earth is obscured by local noise (collaboration)
• Fuller's earth
• brown earth
• Earth Girl Arjuna
• High Earth Orbit
• The Face of the Earth
• Earth Summit
• NEC Earth Simulator
• Scorched Earth 2000
• Red Earth and Pouring Rain
• Pardon me, thou bleeding piece of earth
• God's is the Earth and all on it
• The Late Great Planet Earth
• Robust Nuclear Earth Penetrator
• Back To Earth
• How to destroy the Earth
• Twin Earth
• Earth Observing 1
• Earth Sun Moon
• I Touch the Earth, the Earth Touches Me
• The Earth Is Not A Cold Dead Place
• The New Earth Festival
• earth (user)
• Earth Metals (user)
• earth ground
• The Earth Gods
• New Earth
• Whatever happened to peace on Earth
• Bones of the Earth
• Target Earth
• The Day The Earth Caught Fire
• Earth's heat budget
• Earth shoes
• Horrible, Horrible is Turned the Earth!
• The greatest country on earth
• The Greatest Show on Earth
• Warriors of Heaven and Earth
• From the Earth to the Moon: 1: The Gun Club
• From the Earth to the Moon: 2: President Barbicane's Communication
• From the Earth to the Moon: 3: Effect of the President's Communication
• From the Earth to the Moon: 4: Reply from the Observatory of Cambridge
• From the Earth to the Moon: 5: The Romance of the Moon
• From the Earth to the Moon: 6: Permissive Limits of Ignorance and Belief in the United States
• From the Earth to the Moon: 7: The Hymn of the Cannon-Ball
• From the Earth to the Moon: 8: History of the Cannon
• From the Earth to the Moon: 9: The Question of the Powders
• From the Earth to the Moon: 10: One Enemy v. Twenty-Five Millions of Friends
• From the Earth to the Moon: 11: Florida and Texas
• From the Earth to the Moon: 12: Urbi et Orbi
• From the Earth to the Moon: 13: Stones Hill
• From the Earth to the Moon: 14: Pickaxe and Trowel
• From the Earth to the Moon: 15: The Fete of the Casting
• From the Earth to the Moon: 16: The Columbiad
• From the Earth to the Moon: 18: The Passenger of the Atlanta
• From the Earth to the Moon: 17: A Telegraphic Dispatch
• From the Earth to the Moon: 19: A Monster Meeting
• From the Earth to the Moon: 20: Attack and Riposte
• From the Earth to the Moon: 21: How a Frenchman Manages an Affair
• From the Earth to the Moon: 22: The New Citizen of the United States
• From the Earth to the Moon: 23: The Projectile-Vehicle
• From the Earth to the Moon: 24: The Telescope of the Rocky Mountains
• From the Earth to the Moon: 25: Final Details
• From the Earth to the Moon: 26: Fire!
• From the Earth to the Moon: 27: Foul Weather
• From the Earth to the Moon: 28: A New Star
• earth core
• Nobody Goes to Earth Anymore
• The last woman on Earth
• Peace on earth and good will toward men
• Battle for Middle Earth
• Mother Earth News
• How to save money and help the earth too
• Women are from Earth, but men only wander it
• Google Earth
• Earth's most unusual space launch
• earth sprite (user)
• Adamic earth
• Visiting Earth
• Jimmy Corrigan, the Smartest Kid on Earth
• Assignment: Earth
• Imperial Earth
• Ghreg on Earth
• Cassel earth
• Scorched earth and burned bodies
• When over 95% of its people endure unspeakable torture daily, Planet Earth is officially known as a prison
• Earth Balance
• The Earth Is Not Moving
• How the Earth was destroyed
• Some days it seems like the sun is landing on the earth
• Reasons to invade Earth
• If the earth won't be still, than I will.
• Multiple Users Middle Earth
• Planetary/Batman: Night on Earth
• watching miracles fall to earth, with only my breath to hold
• Live Earth
• Fireflies are like stars on Earth
• a voice that grinds the machinery of the rain to a halt. a voice that tips the earth.
• what infant will love them, in the cold dark earth?
• heaven on earth
• Last Night on Earth
• Why the Earth is Probably Round
• Australia: Deadliest Place on Earth
• Planet Earth
• 20 Million Miles to Earth
• Cursed Earth
• Cool Earth
• Earth Hour
• People of Earth: we could be heroes.
• Large Particle Accelerators and the Destruction of the Earth
• When We left Earth
• The earth's tears make her smiles bloom
• The tears of the earth keep her smile in blooms
• Disgusting Pox Upon the Earth
• The Tallest Man on Earth
• rammed earth
• The Stolen Earth
• Exodus from earth
• The fall of Earth
• Mother Earth
• Earth sandwich
• Graveyards of the earth
• Mother Earth's Plantasia
• Operating Manual for Spaceship Earth
• The Earth Shuddered
• Here's the thing about trying to blow up the Earth
• "United Earth Federation" My Ass
• Please, for the love of everything that is holy on this Earth. I just want the cold back.
• Memories of the Earth
• Red Earth
• and when all the stars have fallen one last time and the skies are crumbling into my hands and the sirens are bleeding out on the beaches and the earth fades; you will remain
• Descent into the Depths of the Earth
• nightly to the listening Earth
• the earth will remember you
• The Witch King of Angmar should not have touched the earth
• Scent of the good earth - a haiku
• When Dinosaurs Ruled the Earth
• God's Green Earth
• in case the sun ever would conquer the earth
• What convinces people earth is a globe?
• The Woman Who Fell to Earth
• this thirsty earth
• 240 human years are experienced every second on earth
• Ask a Human: Greg Answers #11: Special Earth Edition
• a melody of the sun cast to earth
• Alone Except for the Earth
• We won't ditch Earth
• under earth and over moon
• Of all the species on earth, we have the ability to tell the long march of evolution to go fuck itself
• Experience Earth Humor: Pranks with Human Greg #16
• Experience Earth Humor: Pranks with Human Greg #9 and #10
• Space: Earth Orbit (category)
• Space: From Earth (category)
• Earth's Profit
• Five Million Years to Earth
• Here, the earth and the sky meet; fly high
• The Long Earth
• The Hungry Earth
• between Earth Day and the anniversary of Chernobyl

If you Log in you could create a "why on Earth" node. If you don't already have an account, you can register here.