Early on, for example, the Universe was mostly radiation: in the form of photons and neutrinos. Later on, it was mostly matter: in the form of dark matter and normal matter.

For example, if a neighboring universe happened to be close to ours long ago, it may have collided with our universe, creating a detectable imprint.

Mathematical evidence indicates that our universe is flat, but it could be infinitely big, as well. You can figure out if an object is flat with a simple pencil-and-paper geometry exercise. To ...

Are we living in “The Matrix” in real life? In the 1999 science-fiction film, Neo discovers that the universe is a simulation — but one scientist believes that the idea isn’t all fiction ...

An example in physics of information would be, for example, the positions and velocities of physical objects. HOST: And so you're saying that this information on a two-dimensional plane encodes for ...

Called the cyclic universe theory, ... If lambda were too large, for example, the universe would have instantly blown up shortly after the Big Bang.

“In physics, there are laws that govern everything that happens in the universe, for example how objects move, how energy flows, and so on. Everything is based on the laws of physics,” Vopson ...

In such a universe, exiting the top of the cube would bring you back to the bottom, but rotated by, for example, 180 degrees. The new study considered a total of 17 possible nontrivial topologies ...

The universe is still expanding at an accelerating rate, ... For example, the cosmological constant could be replaced by some kind of field linked to some as-yet-unknown particle.