Scientists have known for 70 years that there is much more mass in galaxies than can be seen. For example, spiral galaxies rotate at speeds that are only possible if the total mass of the galaxy is ...

Observations from the European satellite Gaia allow for the refutation of a controversial alternative theory and support the presence of an invisible component constituting the majority of the ...

Here’s what you’ll learn when you read this story: For nearly a century, scientists have been searching for direct evidence of dark matter—one of the key missing pieces of our theoretical ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Quick, low-stakes observations focused on student learning allow administrators to provide teachers with useful feedback on ...

Space Wonders: After making headlines with the first-ever images of supermassive black holes at the centers of two different galaxies, the global collaboration known as the Event Horizon Telescope is ...

Astronomers have detected a mysterious gamma-ray glow from the Milky Way’s halo, potentially marking the first direct observation of dark matter. In a study published November 25, 2025, in the Journal ...