Most explanations rely on "dark energy" to explain the Universe's accelerating expansion rate, but a new study takes a different path.

The Universe is big, as Douglas Adams would say. The most distant light we can see is the cosmic microwave background (CMB), which has taken more than 13 billion years to reach us. This marks the edge ...

I’m getting email and tweets about a Flash-based interactive tool where you can zoom in and out on the Universe, getting a scale of things from the tiniest fluctuations in the quantum foam of space to ...