No, but some scientist believe that the spaces between atoms are made of 'cosmic soup', which produces anti-gravity when it becomes tense. Obviously there's no evidense for this, but hey.
By unconvential propulsion such as a gravity beam (using microwaves) or maybe using electrogravitics.
No one really knows if ghosts actually exist. But if they do they are formed by particles. Particles are attracted by gravity.
Weight would not exist without gravity.
If there is gravity there is weight. So the weight exist only when the gravity exist.
The earth doesn't spin because of gravity, and gravity has not ceased to exist.
Yes. Gravity is a property of mass.
There are a number of different types of car engines. Some of these engine types are Straight/Inline engines, V type engines, Rotary engines and diesel engines.
It is impossible to even speculate. There is no admitted proof that UFOs do exist and no hard information on propulsion.
There are likely places in the universe where there is very little gravity, but it is probably impossible for no gravity to exist somewhere. There is very probably gravitational influence just about everywhere.
No, It exist everywhere, but it does very.
yes
Gravity exists everywhere that mass exists, so the answer is yes.