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Lightning Superbolts: The Sky's Rarest, Most Extreme Strikes
Superbolts are the most extreme lightning strokes on Earth — up to a thousand times brighter than an average stroke. They cluster over the northeast Atlantic, the Mediterranean and the Andes, and peak in winter over the open sea, the mirror image of ordinary lightning.

Noctilucent Clouds: The Glowing Clouds at the Edge of Space
Noctilucent clouds form 76–85 km up, from ice crystals freezing onto meteor dust in air colder than −120°C, and glow because they are lit from below the horizon after dusk. The leading idea for why they are spreading to lower latitudes ties them to rising water vapour from methane — but the climate link is not yet settled.

Cooling the Concrete: How Cities Are Fighting the Urban Heat Island
Cities run hotter than their surroundings because dark, dense, paved surfaces absorb and trap heat. Reflective materials and large-scale greenery can measurably cool them — but the honest, measured figures are around 2°C of air cooling, not the uniform numbers often quoted. A look at Los Angeles, Medellín, Singapore and more.



