James Webb Space Telescope imagery of Pandora’s Cluster (Abell 2744) delivers three galaxy clusters and so much more. Take a ...

The United States has announced that it will send cluster munitions to Ukraine after weeks of internal debate and public speculation. Ukraine has asked for these munitions, which are highly effective ...

Over the past year, cluster munitions—weapons banned by a majority of the world’s countries—have killed or injured hundreds of civilians in Ukraine. Their use, which began the first day of Russia’s ...

While cluster headaches are most often managed with medications and other medical interventions, there may be some things you can also do at home to help ease or prevent symptoms. Cluster headaches ...

Cluster headaches and migraine can both cause severe headaches. Cluster headaches tend to be shorter but can occur multiple times per day. A migraine episode can last days if left untreated. Cluster ...

NPR's Leila Fadel talks to Mary Wareham of Human Rights Watch about the Cluster Munition Coalition report which says there were 987 casualties from the weapons in 2022 — mostly Ukrainian civilians. We ...

A common belief among astronomers is that galaxy groups and clusters differ mainly in the number of galaxies they contain—there are fewer galaxies in groups and more in clusters. Led by Maret Einasto, ...

Star clusters are groups of stars formed from the same material. Globular clusters are old, spherical, and contain many stars. Open clusters are younger, less dense, and have irregular shapes.

In a paper published in the May issue of JAMA, M. S. Robbins, of Weill Cornell Medical College, reviews the diagnosis, prevention, and treatment of primary headaches. In a previous post, I discussed ...