Mars’ Core Revealed, “Pristine” Galaxy Spotted, Alzheimer’s Test Hope, and a Quantum Leap – Science News Roundup (Sept 4–5, 2025)
Space & Astronomy Marsquakes Confirm Mars Has a Solid Metal Core Seismic readings from NASA’s InSight Mars lander have revealed that Mars possesses a solid inner core, much like Earth’s. A Chinese-led team analyzed faint marsquake waves and found Mars’ inner core extends ~613 km (~380 mi) from the center, likely made of iron and nickel, surrounded by a molten outer core phys.org. Previously, scientists suspected Mars’ core was fully liquid; this new finding (published in Nature) confirms a small solid center. “Our results suggest that Mars has a solid inner core making up about one-fifth of the planet’s radius – roughly
