Evolving dark matter may explain cosmic acceleration. Observations support a mixed model. For years, a stubborn puzzle has sat at the center of the standard cosmological model. The evidence clearly ...

Twin satellites are part of this GRACE mission. This orbited Earth in tandem to identify subtle gravity changes. As a result of shifting ocean masses or melting ice sheets, these changes generally ...

Astronomers had long suspected that certain quasars—those brilliant, otherworldly light sources fueled by supermassive black ...

The largest attempt at nuclear fusion to date is occurring in the south of France. Although it has run into some hiccups, it ...