This map shows seismic speed in the Earth’s crust at 200 kilometers depth across the continental United States and portions of Central America and Canada. The North American craton (outlined in ...

Machias Seal Island is a tiny dot on maps of North America ... "If you look at a map, they drew an artificial line right through it between Canada and the US," he said in March.

And yet Connecticut—along with much of the rest of eastern North America—holds important clues ... and a little farther north into Atlantic Canada. It was created over hundreds of millions ...