How much fresh water is in the United States? It's a tough question, since most of the water is underground, accessible at varying depths. In previous decades, it's been answered indirectly from data ...
Morning Overview on MSN
Mega iceberg A23a finally dies after 40 years, melts into eerie blue mush
After four decades adrift, one of the most famous slabs of Antarctic ice has finally lost its shape and status. Iceberg A23a, ...
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