(Phys.org) —Cosmologist Christof Wetterich of the University of Heidelberg has uploaded a paper to the arXiv server in which he claims it's possible that the theory of expansion of the universe might ...

But new studies suggest that one of his most famous ideas, the cosmological constant, may not be fixed after all. If true, it could mean the universe is destined to collapse rather than expand forever ...

An expanding universe complicates this picture just a little bit, because the universe absolutely refuses to be ...

After a century of observations spanning the breadth of the cosmos and theoretical insights that push humanity's vision of the universe to its utmost limits, we can finally, confidently say that the ...

The universe is expanding, and while that fact is fascinating, it also creates a question that trips people up: if it’s growing, what exactly is it expanding into? Our brains are used to picturing ...