It's time to redraw the map of the world during the reign ... a spectacularly clear look at the remnants of ancient subduction zones under North America, Sigloch and her colleague Mitch Mihalynuk ...

In reconstructing the ancient ... d look at maps showing migrations to the Americas, and they'd always just show arrows going in one direction: straight across from Asia to North America," Sicoli ...

An ancient slab of Earth's crust buried ... The discovery was possible thanks to a wider project led by Hua to map what lies beneath North America using a high-resolution seismic imaging technique ...