“He was very taken with the thought that no phenomenon becomes a true phenomena until it has been observed,” Wald told Salon ...

The universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous—and highly ...

"Finding more supermassive black holes that are potentially hosting jets raises the question as to how these black holes grew ...

According to new research, the earliest seeds of structures may have been laid down by gravitational waves sloshing around in ...

Galaxies like the Milky Way grow by merging with smaller galaxies over billions of years, unlike dwarf galaxies, which have long been thought to lack the heft to attract mass and grow in the same way.

Recent research has unveiled a troubling and persistent mystery at the heart of modern cosmology: the universe is expanding ...