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Are we living in a simulation? This experiment could tell us

Physics

Are we living in a simulation? This experiment could tell us

The idea that we might be living in a simulated reality has worried us for centuries. Now physicists have found some tantalising clues – and devised an experiment that might reveal the truth

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Space

A distant galaxy is being strangled by the cosmic web

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Space

Is the expansion of the universe slowing down?

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CMB-S4 will use telescopes installed at the South Pole to measure variations in the temperature and polarization of microwave light across most of the sky to probe for ripples in space-time. Shown here is the South Pole Telescope. Photo: Brad Benson, University of Chicago, Fermilab

Space

The end of US support for the CMB-S4 telescope is devastating

Comment

The 30-year fight over how many numbers we need to describe reality

Physics

The 30-year fight over how many numbers we need to describe reality

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Space

Is the universe really one big black hole?

Comment

Do black holes exist and, if not, what have we really been looking at?

Space

Do black holes exist and, if not, what have we really been looking at?

Features

Space

We’ve discovered the most massive black hole yet

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Chaotic streams of energy appear to slice through space

Physics

Is gravity a new type of force that arises from cosmic entropy?

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Physics

Laws of quantum physics may rule out a universe that came before ours

Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another universe contracting – but quantum theory could rule this out

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Mathematics

Why physicists think geometry is the path to a theory of everything

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Space

Why are the physical constants of the universe so perfect for life?

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Space

The Milky Way's black hole may be spinning at top speed

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Physics

Light has been made into a fluid that simulates space-time

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