"This could completely shake up our understanding of how galaxies form," says Joseph Silk.

A new book covers how the universe will end, including five possible scenarios. In this podcast, the author talks about the end of everything.

Scientists tweaked a 90-year-old computational model to come up with a new age for the universe. The result? 12.6 billion years old.

A new theory about a sphere-shaped universe contradicts the conventional idea that the universe stretches infinitely in all directions.