Is the universe really limited to just four dimensions — length, width, height, and time? For nearly a century, theoretical physicists have been exploring a mind-bending idea: that reality might ...

Astronomers have recently identified a cosmic structure so vast that it challenges our understanding of the universe’s scale.

When the universe's first stars emerged from the cosmic dark ages, they ballooned to 10,000 times the mass of Earth's sun, new research suggests. When you purchase through links on our site, we may ...

The observable universe contains so much matter and so many planets that, if it extends infinitely, identical copies of ...

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Here’s what you’ll learn in this story: Time might actually have 3 dimensions. But it also means that the space would actually be one-dimensional, instead of the three dimensions we’re familiar with.

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of "Ask a Spaceman" and "Space Radio," and author of "How to Die in Space." Sutter contributed this article to ...

We tend not to dwell on the fact that we exist in three dimensions. Forwards-back, left-right, up-down; these are the axes on which we navigate the world. When we try to imagine something else, it ...

The universe is poised to die much faster than previously thought, according to new research by Dutch scientists. But there's no great need to panic. We still have 10 to the power of 78 years before ...