资讯

NPR28 天
Hells Canyon is deeper and younger than the Grand Canyon - NPR
Hells Canyon, the deepest river gorge in the United States, likely got rapidly carved 2.1 million years ago when a shifting landscape in Idaho caused a giant lake to start overflowing.
Abilene Public Radio28 天
Hells Canyon, the deepest gorge in the U.S., is surprisingly young
Hells Canyon, the deepest river gorge in the United States, likely got rapidly carved 2.1 million years ago when a shifting landscape in Idaho caused a giant lake to start overflowing. That's ...
WXXI28 天
Hells Canyon, the deepest gorge in the U.S., is surprisingly young
Hells Canyon, the deepest river gorge in the United States, likely got rapidly carved 2.1 million years ago when a shifting landscape in Idaho caused a giant lake to start overflowing.