A bone-dry
climate, which occurs in periods between ice ages, could make conditions just
right for building up enough underground magma to fuel a giant volcanic eruption,
said Allen Glazner of the University of North Carolina in Chapel Hill. He
presented this idea here last week at a meeting of the American Geophysical
Union. 

Human
civilization has never experienced such a catastrophic
eruption, which could blanket the state of Texas with soot two feet deep,
for about 74,000 years. That’s when Mount
Toba in Indonesia blew its top making history as the largest eruption in
the last 2 million years.

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