A century after Albert Einstein sketched out his radical picture of gravity, astronomers have now watched a black hole ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

One of the most awkward parts of writing a book is that, eventually, authors have to ask people for “blurbs” – the endorsements that you see on the cover of a book, encouraging you to buy it. I am now ...