That cosmologists cannot agree on one of the most elementary facts about the universe is striking enough. But that uncertainty produces others, too: it makes it impossible to calculate an exact age ...

The Hubble Space Telescope is one of the most famous scientific instruments that has ever existed. It’s given the world an unfathomable amount of data and allowed for never-before-imagined exploration ...

You can journey to the ends of the earth in search of success,” 19th-century Baptist preacher Russell Conwell is said to have ...

Our understanding of cosmology hinges on how well we know our own local universe, which remains poorly mapped and poorly ...

Astronomers have discovered the oldest and most distant black hole — a behemoth that likely formed at the dawn of the universe, more than 13 billion years ago. The black hole lies at the center of a ...

What was the universe like in the first few hundreds of millions of years after it came into existence? How did the first ...

Primordial black holes are hypothetical black holes thought to have formed moments after the Big Bang. Because they ...

"Fast radio bursts shine through the fog of the intergalactic medium, and by precisely measuring how the light slows down, we can weigh that fog, even when it's too faint to see." Half of the universe ...