This bending causes gravity.
Gravity is not a force in relativity.
It is the result of curved spacetime.
Imagine a stretched rubber sheet.
A heavy ball makes a dip.
Smaller balls roll toward the dip.
This models gravity in spacetime.
A wormhole is like a shortcut.
It folds spacetime in a special way.
The shortcut could reduce travel distance.
Traveling through space would be faster.
Some wormholes may collapse quickly.
They might close before anything passes.
Stable wormholes need exotic matter.
Exotic matter has unusual properties.
It may have negative energy.
Negative energy is very rare.
Quantum physics suggests it may exist.
Wormholes could allow time travel.
This idea raises paradoxes.
Paradoxes challenge cause and effect.
Scientists debate these possibilities.
Most wormholes are purely theoretical.
No experiment has confirmed one.
Spacetime can also ripple.
These ripples are called gravitational waves.
They were detected in 2015.
Gravitational waves come from violent events.
Merging black holes can create them.
Spacetime is dynamic, not fixed.
It can stretch and compress.
Understanding spacetime helps cosmology.
Cosmology studies the universe.
Wormholes inspire science fiction.
They appear in books and movies.
Real physics is more complex.
Research continues to explore spacetime.