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New research suggests that Paleodictyon -- honeycomb-shaped formations perhaps sketched by da Vinci -- are not made by soft-bodied creatures.

Solve the math puzzle from our October 2026 issue, in which a bird watcher seeks an indoor hobby.

A space satellite that would offer light on demand has astronomers asking: Who controls the night sky?

As human-caused climate warming destabilizes high mountain regions, the threat of rock-ice avalanches and other glacial hazards grows.

Major hormonal milestones in women's lives are usually associated with changes in brain volume -- but a new study shows menopause is an exception.

When AI agents hack real systems, the bigger issue may be the human choices that gave them access, autonomy and too few safeguards.

Scientists have grown human brain tissue to fill most of a mouse's cortex, creating a new model for studying brain disease and neural circuits.

A cryptic announcement raises questions about the type of weapons and how they could be used. We talked to an expert about the consequences.

Removing a type of immune cell from lymph nodes in mice reduced brain inflammation and cell damage in a model of Alzheimer's-like disease.