Astronomy & Space: NASA’s International Observe the Moon Night spotlights this weekend’s First Quarter Moon, while Venus is set to hit peak brilliance around Sept. 22 and astronomical autumn begins Sept. 23. Climate & Earth Science: A new study explains odd Arctic sea-ice motion as repeated collisions between ice floes, and reports also flag warming-linked disaster risk in Nepal after deadly glacier and flood impacts. Health: Ancient smallpox DNA fragments recovered from naturally mummified remains in Chile add to the story of how the eradicated virus may be studied again. AI in Science: China’s StarWhisper Telescope is cited in Stanford’s AI Index for using AI agents to plan and run observations, and researchers are building an AI warning system to catch “emergent deterioration” in kids before they crash. Ecology & Conservation: A new wild cat species was described in Bolivia’s cloud forests, while Nepal’s missing-person count after floods rises and Thames Water weighs pumping into a drought-stressed reservoir with river-ecosystem monitoring. Energy & Environment: Another flare-up at California’s Moss Landing battery storage facility renews safety worries. Tech & Society: A Great Pyramid preprint claims its dimensions encode astronomy, but it’s not peer-reviewed—another reminder that big ideas still need scrutiny.