Part of the Wibblyverse Continuity.
Part One of Doctor Whooves: Friendship is Wibbly Series 1
Next Story: Closer to the Void

The tenth Doctor has managed, through a strange quirk in time, to escape his regeneration, falling instead into a land of technicolor ponies-- which he has visited before. Even here, however, he isn't safe from harm, and an encounter with an old companion leaves him reeling. The Doctor made many mistakes in the Time War; can he even hope to make up for leaving behind his wife and infant daughter?

The ponies of Equestria know Harmony as not just an ideal, but as a force that actively shapes their existence. It guides them through their lives, brings them prosperity and ensures good will triumph over evil most of the time.

However, exposure to it can be unpredictable for those crossing over from other realms. Sufficiently long stays in Equestria can even lead to a change of form to one indigenous to the land.

And those unlucky enough to be slated to become a source of Harmony itself may find themselves unable to leave.

Translation: This fic contains the gradual transformation of a human (male) to a very young alicorn filly.

Set just before Season Five. Non-Earth human and an Equestria that's slightly different.

Cover Art by the talented Mix-up check out his work here: http://amalgamzaku.deviantart.com/

This story is a sequel to Project: Sunflower

After the events of Project: Sunflower, Erin Olsen has returned to Ponyville, happy to pursue her studies in magic. After everything that happened the year before, she's looking forward to spending her days studying and having fun with her friends.

Meanwhile, on the newly discovered world of Harmony, humans and ponies work together to study this strange new world. However, their arrival causes something ancient to begin stirring. Something that may end up changing everything.

Erin will need all of her courage, all of her cleverness and, of course, all of her friends to see herself through what happens next.

Cover art by Valkyrie-Girl
Editing provided by:
Brilliant Point, Coandco, Ekevoo, Ludicrous Lycan, Merlos the Mad and Razalon the Lizardman.

Hello, I'm Mary. I'm a mother of two, married to the most wonderful man I could hope for and live what I consider to be, the life I've always wanted. So... why oh why, in the wide, wide world of whys, did this happen to me?

This is my story, for better or for worse, about how things in my life became beyond unbearable.

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