Science: Airplanes flying through altocumulus clouds can cause localized precipitation. In a paper published by the American Meteorological Society, Andrew Heymsfield of the National Center for Atmospheric Research in Boulder, Colorado, and colleagues explain that for years, aircraft appeared to punch holes in the clouds; now, they realize, the aircraft have been, in effect, seeding the clouds and making it rain.
For the UNESCO section chief, “striking a balance between global coherence and respect for national ownership and cultural diversity is both essential and complex.”
May 13, 2026 01:46 PM
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