Over the last 540 million years, the Earth has weathered three major ice ages — periods during which global temperatures plummeted, producing extensive ice sheets and glaciers that have stretched …read more Source:: Science
Day: March 14, 2019
Exotic ‘second sound’ phenomenon observed in pencil ‘lead’
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•At relatively balmy temperatures, heat behaves like sound when moving through graphite, study reports. …read more Source:: Science