It is the year 2038, and the Earth is slowly being consumed by a space-borne monstrosity dubbed the Black Tide, which is using nanotechnology to remake the planet into something hideously alien.

Erin Olsen works for Project Harmonics, humanity's last-ditch effort to find a new world before the Tide can wipe them out. But when that world is found, and it turns out to be occupied, Erin will need to find the courage to face the unknown in order to save the inhabitants of both worlds.

(Many thanks to Easteu for the fantastic cover image for this story!)

Now with its own TV Tropes page

There is now a follow-up to this story: Sunflower - Side Projects
Sequel: Project Sunflower: Harmony

This story is a sequel to Changeling Space Program

Twilight Sparkle's experimental interplanetary drive has malfunctioned, stranding Starlight Glimmer, Spitfire, Cherry Berry, a changeling and a dragon on a hostile planet in another universe. With limited food supplies, very little magic, no communications with home, and no way to leave the planet, they must survive until somepony rescues them.

Fortunately they crashed right next door to another creature with the exact same problem- a creature named Mark Watney.

They're going to science the buck out of everything- and do whatever it takes to survive Mars and get everybody home.

TVTropes page here! Thanks to GymQuirk for making it!

Commissioned art and fan works from the readers! Thanks, everybody!

This experiment in an updates-daily story was made possible by a generous grant from Canary in the Coal Mine and viewers like you.

(Sex tag for crude talk about sex, but no actual sex in the story.)

Discord had done it. He had turned Ponyville into the Chaos Capitol of the World, the Mane Six were torn apart, and he was above it all. But then, that accursed letter was brought to Twilight, and all his hard work was unravelling by the second. Before he was turned to stone again, however, he noted that there was one crucial thing in his plan.

He was dying.

That's right, he was dying. The Princesses knew they turned him to stone, but they didn't know that the nature of the Elements would poison a being of pure chaos. Well, before he had to pass on, the dying spirit transferred his essence and power to a host that was compatible with the magic of the Elements and Equestria's harmonic nature, and the host he chose, was none other than Twilight Sparkle herself.

Thankfully, Twilight is still herself (mostly), but can everyone cope with the new spirit of chaos being none other than the Element of Magic herself? And how would Twilight react to this?

This story got featured. Formerly on haitus for editing and for the idea train.

This story is a sequel to Celestia

Villains rarely appear out of thin air. They start as most creatures do, but fall victim to fate, choice, manipulation... or love. Princess Luna's descent into the Nightmare is something that has been long forgotten by modern ponies, but Luna will always remember.

(Sequel to Celestia, and a part of the past that she would rather keep hidden. Reading Celestia is strongly recommended!)
(Many thanks to my prereaders Noble Cause, Metallusionsismagic, and BradTheBrony!)
(Character tags will be added as the story develops!)
(Coverart is a placeholder for the moment, until I get something better!)
(BEWARE POTENTIAL SPOILERS IN COMMENTS!)