How Was the Grand Canyon Formed?


Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here:

It’s a long story…
↓ More info and sources below ↓

How do you make a Grand Canyon?

Thanks to Mike from PBS Idea Channel and Jamin from PBS Game/Show for hanging out at the Grand Canyon with me!

Special thanks to Raymond Schillinger for great camera work!

I was in Arizona recently for Phoenix Comic-Con, and had the amazing pleasure of seeing one of Earth’s greatest natural wonders… the Grand Canyon. More than a mile deep, and several miles across, it just defies belief. But I couldn’t help but think, the Colorado River down at the bottom isn’t that big. How did it cut a canyon so massive? How old is the Grand Canyon?

Here’s its story

Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!
Follow on Twitter:

Follow on Tumblr:
Follow on Instagram:

It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
For more awesome science, check out:
Produced by PBS Digital Studios:

Joe Hanson – Creator/Host/Writer… and camera for this one!
Joe Nicolosi – Director
Amanda Fox – Producer, Spotzen IncKate Eads – Producer
Andrew Matthews – Editing/Motion Graphics/Animation

Theme music: “Ouroboros” by Kevin MacLeod

Other music via APM
Stock images from Shutterstock, stock footage from Videoblocks


Last week’s video:
Why Are The Bees Dying?

More videos:
Why Does February Have 28 Days?
Why Vaccines Work
Why Are Some People Left-Handed?
Where Does the Smell of Rain Come From?


Xem thêm bài viết khác:


  1. WOW don't listen to these morons. Anyone can see that it was caused by a massive flood! the rocks aren't billions of years!!! They are lying to us. The earth is only around 6000 years old and anyone who says otherwise is either misinformed or an Idiot.

  2. wait, but what i took in school about what formed it was the asteroid that killed the dinasours

  3. Wait hold up. You mean a lot of north America was covered in ocean? There were no cars and fossil fuels and cow farts polluting the atmosphere and the sea level rose anyway?

  4. Nice fantasy. Any time someone starts off with "1 billion years ago" i.e. 'a long time ago in a land far away', you can be sure it's a fairy tale.

  5. Ill give simple proofs that this canyon is man made by the diamond minings that we were never told of, just look far away up at the natural straight line of the mountain a.k.a ground behind this guy way, way back back to, it is so straight and that it means that canyon was once flat ground and high just like where he was talking from and even more proof is that those edge lines are so perfect and well rounded that were done by some digging machines, to get a proof that why they were done by machines, ask yourself why does almost the whole shapes, structures and the overall desing of these mountains looks so perfect because look throughout the whole end of the mountains, they are so perfectly dug in the same patterns almost every where you look.


Please enter your comment!
Please enter your name here