• NASA telescopes detect unusual chemistry in interstellar comet 3I/ATLAS

    NASA released the first results of James Webb Space Telescope (JWST) observations of interstellar comet 3I/ATLAS on August 25, 2025, showing a coma dominated by carbon dioxide. The comet was observed on August 6, and complementary data from Hubble and SPHEREx confirm unusual volatile ratios.

  • Weak La Niña and disrupted vortex forecast to bring colder 2025/26 winter to northern U.S., southern Canada, and parts of Europe

    A weak La Niña and signs of a disrupted polar vortex are forecast to shape colder-than-average winter conditions across the northern United States, southern Canada, and parts of Europe during the 2025/26 season. Early seasonal outlooks suggest a higher likelihood of Arctic air intrusions and persistent cold anomalies from December 2025 through February 2026.