In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate. Much has been learned about the geology of the Grand Canyon and about the ...

In addition to heart-pumping aerial footage, viewers will enjoy an overview of the Grand Canyon's history and a CGI animation of the canyon's geological formation. Worth noting, this is not shown ...

LIZ BONNIN: Hi, I'm Liz Bonnin, and I'm digging through the BBC's amazing archives to find out all about physical geography. Now there are a few things you need to know for this next clip.