The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said hot and humid weather is ...

Thick fog and ash covered Bulusan Volcano after it erupted in the Philippines. Video shows the ominous blanket of churning ash and steam obscuring the volcano in Sorsogon, early morning on April 28.

Scientists have long struggled to define brain fog—let alone pinpoint a cause for it. But research is starting to reveal multiple potential causes from inflammation to a leaky blood-brain barrier.