A 20-foot-high wall of mud, ash, and melted snow roared down the mountain, snapping tree trunks. Three days later, a huge mass of ashes and gases shot out of the volcano, devastating a swath a ...

The tree line, also known as the timberline ... which have been linked with ongoing volcanic eruptions. As volcanoes in the Northern Hemisphere erupted, they spewed so much debris into the ...

Scientists found more than 30 trees approximately 3100 metres above sea level – 180 metres higher than the present tree line – while carrying out ... temperatures were influenced by centuries-long ...