North America’s geological core has persisted ... and indeed showed up in the cross sections of seismic velocities that Hua and his colleagues made. A diagram demonstrates the researchers ...

And yet Connecticut—along with much of the rest of eastern North America—holds important clues about Earth’s history. This region, which geologists call the eastern North American margin ...

“For me, the great joy in life today is traveling across the face of North America out in nature,” he says. “And these birds, they do that to the max.” By following the shorebirds on their ...