Albert Einstein developed the theory of general relativity in the early 20th century, providing a new framework for understanding gravity and spacetime.

The curvature of spacetime is influenced by the presence of mass, energy, electromagnetic fields, and even dark matter.

In general relativity, gravity is not a force but rather a consequence of the curvature of spacetime caused by the presence of mass and energy.

Time dilation is the phenomenon where time passes slower for objects moving at relativistic speeds compared to stationary observers.

Length contraction is the phenomenon where objects appear shorter in the direction of their motion due to the effects of special relativity.

A singularity is a point in spacetime where the curvature of spacetime becomes infinite and the laws of physics break down.

A wormhole is a hypothetical tunnel-like structure in spacetime that connects two distant regions, allowing for faster-than-light travel.

A singularity is a point in spacetime where the curvature of spacetime becomes infinite and the laws of physics break down. It is believed that the universe originated from a singularity at the Big Bang.

The equivalence principle states that the effects of gravity are equivalent to the effects of acceleration, and that all objects fall at the same rate in a gravitational field regardless of their mass.

Gravitational lensing is the phenomenon where the presence of a massive object bends light and other electromagnetic waves, causing them to deviate from their original path.

Dark energy is a hypothetical form of energy that is believed to be responsible for the accelerated expansion of the universe.

Accelerated expansion is the phenomenon where the universe is expanding at an accelerating rate, as evidenced by observations of distant supernovae.

Dark matter is a hypothetical form of matter that is believed to be responsible for the formation of galaxies and other large structures in the universe.

The Big Bang is the prevailing cosmological model for the universe's origin, stating that the universe originated from a single point of infinite density and temperature.

The Big Freeze is a hypothetical scenario for the ultimate fate of the universe, where the universe expands forever and eventually reaches a state of infinite expansion and coldness.