Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say.

In the history of science few developments have been more important than the advent of the new heliocentric cosmology in the sixteenth and seventeenth centuries. Whereas most of the ancient Greeks ...

In a future so distant that all has decayed to nothingness and time itself ceases to exist, might this eternal moment of oblivion bring on a fiery resurrection to all of space and time? Kristi ...

Over the past decade, cosmology has been embroiled in a growing ... fluctuations in the cosmic microwave background (CMB) — an ancient snapshot of the universe's first light contained within ...