UFO's main means of achieving FTL speeds is not by controlling

gravity or warps or anything like that. They work by a controlled

negation of inertia or mass. By eliminating mass, and thus inertia,

the basic laws of physics can be circumvented allowing

temendous velocities and accelerations. The mass is usually not

negated completely or even a single molecule would stop the ship.

The negation of inertia must be controlled depending on the mass

density of the local environment and the velocity of the ship. The

greatest speeds can be achieved in interstellar space and even

 greater speeds in intergalactic space where particle density is at

 it's minimum. Of course the ship still requires a form of propulsion

but that's a secret. Life didn't originate on earth or even in this

solar system. We aren't from this solar sytem, we are colonists, a

 race of metamorphs designed to be able to live on europa. DNA is

the basis for life everywhere. All life in the universe is carbon

based. Only carbon based life can exist because it is the only

element capable of the almost infinite chemical forms (like

proteins) that are necessary for life. About 10 billion years ago life

 apparently started somewhere and a race of intelligent beings

 arose. They achieved the science neccesary to spread life. They

scattered pods throughout the universe that carried a primitve

form of life similar to bacteria. When these pods encounter a

suitable environment, life and evolution begin anew. We and you

are a result of these lifepods. We wondered about the origin of life

for a long time until we found one of the pods. It gave us a

technological leap of many generations , they are extremely

 advanced machines. The pod that brought life to your planet is

probably still here waiting to be found. We are still searching for

the planet that spread them but it has probably been consumed by

 it's sun by now. No one knows who or where the Originators as we

call them are