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Immune Cells Flood Into the Aging Brain, Stanford Scientists Discover
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Immune Cells Flood Into the Aging Brain, Stanford Scientists Discover

For many years, the brain's immune system was largely considered distinct from the rest of the body's defenses. The brain possesses its own specialized immune cells and is protected by the blood-brain barrier, which limits the entry of many substances and cells into brain tissue.

Diego Herrera

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236-Million-Year-Old Fossil Suggests Early Live Birth in Mammal Ancestors
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236-Million-Year-Old Fossil Suggests Early Live Birth in Mammal Ancestors

Scientists may have to revise the evolutionary timeline of mammalian reproduction. A new study, published in Frontiers in Mammal Science, presents the first strong evidence that some cynodonts, the ancestors of mammals, may have given birth to live young much earlier than previously understood.

August 15, 2026

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