New Habitat world

They had arrived the day before yesterday, selecting this planet. Scans had deemed the planet perfect for Saeva Simius colonisation , being 3.8 times the size of Earth
Something had been found here though, left among the planets intricate system of tunnels and caverns that ran amok under tall mountains
It was believed to be an Ark, which was thought to be an ancient device of the Aetherii which was designed to provide a safezone of sorts. It was believed that its interior contained genetic samples of life forms for cloning and the facilities to do so.
But getting inside... It had been locked securely and nothing they did seemed to open it. The remaining handful of Aetherii themselves, when consulted, seemed to have little knowledge of the device itself, which was unsurprising given its age.
What secrets lay within this locked sanctum...