Four volunteers are spending a year in NASA's 3D-printed Mars habitat, simulating life on the Red Planet. This mission, CHAPEA, tests how isolation, limited resources, and confined spaces affect human health and teamwork. Researchers are gathering crucial data on sleep, stress, and problem-solving to make future Mars missions safer and more achievable.

Scientists have uncovered massive, dense rock structures deep beneath the western Pacific, challenging long-held theories about Earth's mantle. Advanced seismic imaging reveals these anomalies, which don't fit current models of subducting tectonic plates. Their existence suggests a more complex and ancient Earth interior than previously understood, prompting a re-evaluation of geological processes.