What if spacetime is timeless?

Time is everywhere in our lives, and its concept is deeply rooted in our existence. You know how old you are, how long a day is, or how long it will take you to go from one place to another. Time, in our everyday life is simply the way we …

Modeling of the flow of time – Big Bang in a laboratory

For the first time, emulating a Big Bang-like event in metamaterials allowed physicists to show why the cosmological arrow of time points in the same direction as the thermodynamic arrow of time.
Metamaterials have fascinating properties: with their periodic structure, light can be manipulated very easily in many different ways. By …

Traveling faster than light?

That’s probably one of the most common questions people ask when thinking about space travel: is it possible to travel faster than light? And if so, will we be able to, someday?
While this could have been part of the article Will we ever travel to other stars?, I chose to …

Avoiding the grandfather paradox

Time travel has always been fascinating to everyone, and it has been tackled in every possible way by science fiction. A concept of Einstein’s general relativity called Closed Timelike Curves (CTCs) offers the possibility to travel backwards in time. Time traveling has raised various paradoxes, such as the grandfather paradox: …

Timelike quantum entanglement

Entanglement is probably one of the most fascinating aspects of quantum mechanics. Two quantum particles, such as photons for example can be linked in such a way that they are two parts of the same entity, even if the two particles are extremely far from each other. In other words, …

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