A faint radio "whisper" from ancient hydrogen reveals the universe was heating up long before it filled with starlight.

This controversial theory says the universe is subject to an ultimate, higher-order law that we can’t comprehend.

According to the model, dark matter may have started as particles that were hot, light, massless, and fast. As the universe ...

Researchers have built a small but powerful detector to find gravitational waves in a hidden frequency range. The discovery ...

Scientists found where the universe’s missing matter went. Black holes have been pushing it far away from galaxies.

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

New observations from the James Webb Space Telescope hint that the universe’s first stars might not have been ordinary fusion ...

Astronomers have discovered a primeval but the most pristine star ever found in the universe. According to a research team ...

Astronomers have a new explanation for mysterious "little red dots" observed in the early universe: Maybe they're not crowded star clusters that upend everything scientists know about galaxies. Maybe ...

Even before the first stars lit up the Universe, the Cosmos was not the cold place most researchers once imagined. New ...

Scientists using NASA's James Webb Space Telescope now think the "little red dots" spotted in the early universe could be a new kind of space object. They call it a "black hole star." - T. Müller / A.