Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

For only the third time in history, astronomers have detected a new interstellar visitor — an object from another star — blitzing into our solar system.

A key advisory group vows to base decisions on evidence, boost confidence in vaccines and protect health. Experts fear the opposite is happening.

The vanilla species grown for its flavoring is finicky. Genes from its wild relatives could help make it hardier — but not if those cousins go extinct.

Algae grown under Mars-like conditions could make bioplastic building materials for structures to harbor life in space.

AI models such as ChatGPT consume serious power. Experts break down where that energy goes, and what you can do to help.

Art and literature hint at past people’s psyches. Now computers can identify patterns in those cognitive fossils, but human expertise remains crucial.

Exploding stars V462 Lupi and V572 Velorum are best seen from the Southern Hemisphere. One has been spotted from the United States.

In a small cell therapy trial, 10 out of 12 people with type 1 diabetes no longer needed supplemental insulin, even a year after treatment.

A GLP-1 drug led to fewer days with headaches, a small pilot study of migraine sufferers shows. It may work by lowering pressure inside the head.

Even without reaching heat wave levels, sustained high temperatures may contribute to a litany of health issues.

New imaging tools reveal how within an hour of infection, the virus begins to alter our chromosomes to kick-start its own replication.