Geology: Piecing Continents Together

Were all continents once snuggled together in a mammoth land mass surrounded by a single shimmering sea? Did the continents begin to drift apart some 200 million years ago? Some scientists believe so, and many recent findings support them. This month still more compelling evidence of continental drift was reported by U.S. and Brazilian geologists. Their principal finding was that two highly distinctive adjacent geological areas on the Atlantic coast of Africa match perfectly with a pair of rock regions located along Brazil's northeast coast.

Doubting & Digging. "Actually, we set out to disprove the theory when we started," said...

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