Why does gravity cause pressure?

[kurious]

Why does pressure cause gravity?
As the universe expands dark energy increases.If dark energy gets its energy from gravitational force carriers as space expands,then perhaps the reverse process can occur - masses can get more force carriers by squeezing dark energy/space.

 

[urtalkinstupid]

Dark energy is only theoretical.

As the universe expands dark energy increases.

Ok, but dark energy is still theoretical.

If pressure were to cause more gravity, doesn't that tell you something about what gravity is and what it isn't?

 

[Alkatran]

Why does pressure cause gravity?
As the universe expands dark energy increases.If dark energy gets its energy from gravitational force carriers as space expands,then perhaps the reverse process can occur - masses can get more force carriers by squeezing dark energy/space.

Gravity causes pressure, not the other way around.

The force downwards causes air molecules to move downwards, pushing on things below them (which is pressure).