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There's a faint gamma-ray background in the universe, and scientists now think it could be caused by dark matter.

Because it doesn't interreact with light or electromagnetism, dark matter exists to us only through its influence on visible ...

A colossal cluster of galaxies is bending the very fabric of space—and it’s the focus of this week’s breathtaking image from ...

Get ready for a new Roman Empire: A NASA space telescope will detect a staggering wealth of intricate gravitational lenses that could help unlock the mysteries of dark matter.

Undergirding the structure of the universe. Dark matter isn’t just floating around filling up empty space. Importantly, it is found in clumps and structures, similar to ordinary matter.

A new study using the Hubble Space Telescope suggests that we understand dark matter even less than we thought previously. The hypothesized matter is thought to exist based on the mass of galaxies ...

New observations support the idea that hot, diffuse threads of gas called cosmic filaments connect clusters of galaxies ...

Even though we can’t see dark matter (as it doesn’t emit light), we have been aware of its effects for more than 80 years, by observing how galaxies cluster and move around.