In the magical land of Equestria, two alicorn sisters raise the Sun and the Moon every day to give the world a night and day cycle, basic for the survival of life. There are also two alicorns who rule over two very core aspects of life and harmony itself. Those are Love and Friendship. While not as ancient as the two sisters, all princesses are essential to the world's balance.
This balance is also sustained by the hard-working ponies, who make the seasons change and manage the weather to fit their needs, so everypony has enough food and water, and every animal is also attended to assure that any of them are caught in the changes of seasons.

But what about the planet itself? What about Mother Nature?
This is the question that Gaia asks when she arrives to this foreign world. After so much work her son persuaded her to take a long vacation in Equestria, saying that she needed one and assuring her that he would be in charge now, and she must take a break. But what can a several billion-year old alicorn possibly do to pass her time in this land?

(SimEarth/MLP Crossover)
(Timelife of Gaia's life 'till the start of the story)

Ugh.
Alright, do you want some advice?
Don't go evil if you don't want to have heroes trying to kill you repeatedly. I know, sometimes you have to do things that are morally questionable, but at others, just be a good guy. Wait in line rather than summon a horde of undead to tear the throats out of everybody except the barista. Or just freeze everybody in place. That's at least funny in a conventional sense.
I'm (sort of) reformed now.
Unfortunately, there're these six mares and their ruler who are making this VERY DIFFICULT.

EDIT: After four days, the Featured streak has ended. It was a good run.
EDIT: Featured again on 10 May? Aw, stahp it guys. Stahp.

EDIT: New coverart courtesy of Leila Drake. Go to her and commission stuff.

An accident in the lab sends our favorite boy genius to Equestria, as a pony. What will he do and how will he get back? The answer: Science! (Cover Art Updated!)
New FAQ! and TV Tropes!
Planned Phrases from Dexter:
“Pinkie Pie! Don’t push that Button!” /to Pinkie
“Please, Magic is the word simpletons and the ignorant use to describe what they cannot understand.”/ to Twilight
“No, I didn't strap a rocket to you. I strapped you to a rocket.” /to Rainbow Dash
“Friends? Who needs friends?”

Dexter is a boy super-genius with a disdain for anything girlish and no desire for friendship. After an mishap in his lab, he gets stuck in Equestria. How will he cope with the over-friendly ponies, and the girlish everything?
For any who do not know Dexter's Lab: http://en.wikipedia.org/wiki/Dexter's_Laboratory
[RIP Christine Cavanaugh: 8/16/63-12/22/2014] - Dexter's Original Voice Actress

Below her, the remains of the world, and everyone in it, spin slowly, around and around, in a sea of purple goo. But that doesn't mean Celestia's work is done. The Road lies ahead of her, and at its end—the most difficult decision of her life. Again.

How long can one pony keep hope alive?

Long.

2nd place in the "History Repeats" write-off.
Dramatic reading by AShadowOfCygnus.
Dramatic reading by Cherax.
On EQD Aug 12, 2014.

Trees shorter than they should be, buildings smaller than preferred, a world filled with creatures bigger than him, yet others are near microscopic from his perspective.

Trying to find out where he should fit in is hard, because he is not too small, but most definitely bigger than most. Once he connects to the dominant civilization, a whole new world of opportunities is revealed before him.

He will walk as a giant. He will walk with giants. He will walk alone.

Edited by Newbiedoodle, CheesewedgeFTW, Immortan Joe, and Silas