The Story of Equestria

It is questionable just how we became what we are. To know, we will first have to show how we got there.

Early in the history of YOUR planet, you had no oxygen in your air. Instead, there were toxic gasses. Lightning, comets, and asteroids fell like shots from a starship. There were no liquid oceans; rather, lava composed the seas. This world sounds like hell, but it was soon going to get much worse.

Jupiter was orbiting twice for every orbit of Saturn. This gravitational disparity pushed the outer planets further away.

Beyond the orbit of Pluto there is a ring of long-period comets called the Kuiper Belt. And beyond that is an Oort Cloud, with more. In a way similar to a bathtub's water rising when you get in, the comets were flung by the incoming Uranus and Neptune toward the Inner Solar System. This was called The Great Bombardment. It caused the earlier mentioned comets and asteroids.

The "caught" planets either were destroyed by this "Hellrain" or absorbed it and grew. And when they became larger they began taking out each other.

The Sun's Stellar Cloud originally produced twenty planets. However, the Great Bombardment decimated them. However, one that is no longer in the sky remained: Thea. And it was on a path to Earth.

It slammed into the planet with a force above that of nuclear weapons. It was much smaller than Earth, and was thus destroyed by the impact. Part of it became the Moon.

Meanwhile, comets and asteroids brought water to this world. It eventually accumulated into seas. The moon gave it tides, washing vital elements into the ocean.

Lightning struck at one of these nutrients, upgrading it like a superhero comic, into RNA. this can code for life, and replicated faster than it was being destroyed. It formed a nucleus, which in turn created a cell membrane to protect itself.

But RNA is just one strand. If it makes a mistake, it cannot be corrected. And some mistakes can be fatal.

So it developed into DNA. However, it still developped mistakes. But natural selection did not spread the bad ones...and favored the good. This is called evolution.

The horses of Gliese 581 d evolved sentience, suction pads on their hooves, and in some cases, wings and horns. But this eventually led to a problem. What was it? Find out in the next episode.