"It's the find of the century."
Sneddon, regarding the derelict (from Alien: Out of the Shadows)

The derelict on LV-178 was a crashed Dog-alien spacecraft discovered on LV-178 in 2159. The ship was buried deep underground but was uncovered when a trimonite mining operation run by the Kelland Mining Company broke through into the cave where it had come to rest. The miners were subsequently exposed to a Xenomorph outbreak as a result of the Eggs stored on board the ship.