North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new ...

these giant flying squirrels crossed the Bering Land Bridge alongside other mammals about 5 million years ago." This land bridge is hypothesized to have linked North America with Asia at various ...

rex precursors likely arrived in North America after crossing the Bering Strait between modern-day Siberia and Alaska around 70 million years ago. The finding tracks with past research that ...

"Beginning 66 million years ago, we go from a completely sub-tropical environment across North America to grasslands to a frozen savanna, and finally, reaching the Ice Age," Shupinski said.

A hotspot that now lies in the middle of the Atlantic Ocean was once under the Great Lakes, and may explain why they formed where they did. When you purchase through links on our site, we may earn ...