For millions of years following the Big Bang, after the universe’s roiling soup of particles had cooled, the cosmos was a ...

For decades, cosmologists have wondered if the large-scale structure of the universe is a fractal: if it looks the same no matter the scale. And the answer is: no, not really. But in some ways, yes.

Just how long has the universe been around? Scientists estimate the universe is 13.8 billion years old, with an uncertainty ...