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North America is 'dripping' down into Earth's mantle, scientists discover
Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...
CBC.ca4y
100 million years ago, Alberta was a giant sea, surrounded by tropical forests
A giant inland sea cut right across North America ... leaving us with only half the picture of North America’s ancient life. Still, Canada’s prairies are full of clues about the continent ...