Why we have nightmares and how to stop them

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. CNN  —  We leave behind our fears of monsters under the bed as we say goodbye to our childhoods, but one can follow us into adulthood and loom over our heads. Nightmares are more common in…

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Scientists uncover why “stealth” volcanoes stay silent until eruption

When volcanoes are preparing to erupt, scientists rely on typical signs to warn people living nearby: deformation of the ground and earthquakes, caused by underground chambers filling up with magma and volcanic gas. But some volcanoes, called ‘stealthy’ volcanoes, don’t give obvious warning signs. Now scientists studying Veniaminof, Alaska, have developed a model which could…

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