PHOENIX — NASA has decided to bring home four members of the International Space Station crew because of a medical issue with one of them, the first time NASA has
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Artist’s concept of the fast-spinning asteroid 2025 MN45. It’s the fastest-rotating asteroid with a diameter greater than 500 meters (0.3 miles) that scientists have yet found. It’s 710 meters (0.44
When the International Space Station plunges to its fiery doom in 2030 its loss to science will be incalculable, even if it remains an open question as to whether its
ORLANDO, Fla. — Blue Origin says the second launch of its New Glenn rocket, carrying a pair of NASA Mars spacecraft, is scheduled for Nov. 9. The company formally announced
SpaceX’s recent attempt to advance its Starship program encountered a significant setback when Booster 18 experienced a rupture during a gas system pressure test. The incident occurred at the company’s
A new study has revealed how phosphorus, a nutrient essential for photosynthesis, surged into ancient oceans and started Earth’s first major rise in atmospheric oxygen more than 2 billion years
Biosignatures & Paleobiology Status Report eartharxiv.org November 12, 2025 Life processes and requirements resulting in the production of specific molecular structures that, if preserved, can function as biosignatures. B) OM
A)–(D). Spectrally integrated flux maps for HCN, CO, CH3OH, and CS in K2. Contour intervals in each map are given in multiples of the rms noise. The rms noise (σ,
Ancient explosive volcanic eruptions on Mars could help explain mysterious hints of buried ice from the Red Planet’s equator, a new study finds. Previous research has found that the surface
A newly found interstellar comet poses absolutely no threat to Earth, but a NASA-coordinated group plans to observe it to help our ability to monitor any future objects that might
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