Dazzling auroras fade from skies as sunspot turns away

The spectacular auroras that danced across the sky in many parts of the world over the weekend are fading, scientists said Monday, as the massive sunspot that caused them turns its ferocious gaze away from Earth.

Brazil's flooded south paralyzed as waters remain high

Brazil's flooded south remained paralyzed Monday, with schools and health centers shut and streets cut off as overflowing rivers showed no sign of receding after torrential rains in a disaster that has left 147 dead.

Second night of auroras seen 'extreme' solar storm

Auroras lit up skies across swaths of the planet for the second night in a row on Saturday, after already dazzling Earthlings from the United States to Tasmania to the Bahamas the day before.

First 'extreme' solar storm in 20 years brings spectacular auroras

Earth was set to be struck by more powerful solar storms on Saturday, a day after the most extreme events in two decades triggered spectacular celestial light shows from Tasmania to Britain and threatened possible disruptions ...

Visual observation of photonic Floquet–Bloch oscillations

Recently, the exploration of Bloch oscillations (BOs) in periodically driven quantum systems, equivalent to "Floquet systems," has drawn tremendous attention because their exotic characteristics are profoundly distinct from ...

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