They cannot.
No
The plural of defy is defies. As in "this defies the laws of gravity".
The chemical that is called defying gravity.
Magnets do not defy gravity, but they can create forces that appear to defy gravity. When a magnet is placed near an object, it can create a magnetic force that opposes the force of gravity acting on the object. This can make the object appear to levitate or hover.
Ultimately, no.
The water seemed to defy gravity.
The anti-gravity wheel uses magnets to create a repelling force that counteracts gravity, allowing the wheel to levitate and appear to defy gravity.
You have to be a vetaschnadin.
nothing
No.
Borodümsc idché
UFOs are simply things that not readily identified. They are not 'alien' spaceships. Nor do they defy gravity and there are many phenomena that do not make any noise.