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The explosion of a Ukrainian decoy drone in Bulgaria near the Romanian border reveals gaps in Bulgaria's defenses, raises questions and shines a light on the country's policy shift on the war in Ukraine.

The brain's immune cells are increasingly recognized as key players in Alzheimer's disease, but exactly how they change as the disease develops has remained unclear. A new study published in Nature Genetics provides the most comprehensive map to date of these cells, identifying a

If you ask Vijay Parashar, associate professor of medical and molecular sciences (MMSC) at the University of Delaware College of Health Sciences, human bodies are bags of bacteria. "It sounds gross, but not all bacteria are bad; most of them are good. The trouble starts when the