Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

A paper published in 2024 theorizes that time may have existed before the Big Bang, but we're still not entirely sure.

For decades, scientists have been puzzled by the missing mass in the universe. While we know that about 85% of the universe is made up of dark matter, the remaining 15% is made up of normal (baryonic) ...

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s matter. The rest is mysterious dark matter. But even that modest slice didn ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

Primordial black holes are the earliest black holes thought to exist, and they vanished almost as fast as they came into ...

That is a defining factor distinguishing ACT.” The new pictures of this background radiation, known as the cosmic microwave background (CMB), add higher definition to those observed more than a decade ...

Experts have unveiled the most detailed images yet of the universe’s infancy, capturing light that traveled for more than 13 ...

Data from the Atacama Cosmology Telescope (ACT) has now given researchers new detailed images of the universe's earliest ...

Research by the Atacama Cosmology Telescope collaboration has led to the clearest and most precise images yet of the universe’s infancy, the cosmic microwave background radiation that was ...