Precursors

The Precursors were a Tier IV Civilization that existed during the early-days of the Galaxy around 7 billion years ago to around 14,000 BCE making it the only known alien species to have existed beyond the Tier I-A level next to the human race. Their civilization was considered Hyper-Advanced due to their known technology and having seeded the DNA of the Human Race around 200,000 BCE which is believed to have given rise to modern human intelligence allowing them to take their place. They have been called the Seeders the Adam Species and even the God Species due to their advanced technology which continues to baffle human scientists in their function.

History
The Precursors also known as the Seeders first appeared in their planetary fossil record around 7.9 billion years ago being one of the oldest species in the Galaxy. They are known to have become spacefaring around 400,000 years later according to their own historical records. However they only left their own system around 7.2 billion years ago.

Around 5.2 billion years ago they used their own genetic code to begin spreading their colonies throughout much of the Orion Arm of the Milky Way but long range expeditions using the Under-Space has shown them having expanded as far as 32,000 light years being the largest recorded civilization at the time.

It would be around one million years ago that their civilization began a extremely fast decline loosing 90% of their space to unknown forces but is presumed to have been caused by the Atlanteans which appeared in their historical records as a species they were at war with.

In the period between 500,000 and 400,000 BCE their civilization was reduced to only a handful of worlds and their home world would be destroyed in a orbital anti-matter bomb destroying almost their entire civilization.

The Precursors around 175,000 years ago seeded their DNA into early hominids on Earth and began to leave mysterious objects on former colony worlds which contained zettabytes of data but were written in a language that was extremely mysterious and began to decoded only in 2549.

Around 15,000 BCE their civilization mysteriously vanished and it was presumed that their civilization went extinct or migrated to outside the milky way as all trace evidence ended.