The interstellar comet 3I/ATLAS does not come from our corner of the Milky Way, and may be a time capsule of the early galaxy, new research into its trajectory hints.

A detailed look at Yellowstone's magma storage system finds that only one region is likely to host liquid magma in the long term.

Veteran astronaut Michael Fincke's sudden medical emergency aboard the ISS is a stark reminder that, as NASA pushes toward long-term lunar missions, astronaut health remains one of spaceflight's biggest unknowns.