New lava lake lets DR Congo volcano 'breathe', experts say

The reappearance of a lava lake in the crater of the Nyiragongo volcano in eastern DR Congo is a good sign, experts said Sunday, four months after a major eruption killed 32 people.

'Ancestor' of Mediterranean mosaics discovered in Turkey

The discovery of a 3,500-year-old paving stone, described as the "ancestor" of Mediterranean mosaics, offers illuminating details into the daily lives of the mysterious Bronze Age Hittites.

Volcanic ash cloud halts flights to and from Spanish island

A massive cloud of ash prevented flights in and out of the Spanish island of La Palma on Sunday as molten rock continued to be flung high into the air from an erupting volcano.

California fights fire with fire to protect giant sequoias

The so-far successful battle this month in California to save the world's biggest trees from ever-worsening forest blazes seems to offer an important lesson: You can fight fire with fire.