The “dark energy” field that has fueled the expansion has been weakening over the past 4 billion to 5 billion years, new data ...

New insights from the Atacama Cosmology Telescope offer unprecedented images of the universe at 380,000 years old, revealing ...

Here is what you need to know about what many scientists have called the greatest mystery in the universe. No one knows. It is invisible and it does not interact with matter or light. And it may ...

When Bahcall began her research, the standard cosmological model was the Standard Cold Dark Matter (SCDM) model, which posited that the universe had to have enough matter to stop its expansion ... or ...