Dinosaurs may not have seen the Grand Canyon after all
![Grand Canyon](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/06/ticker_GC_free.jpg?fit=860%2C460&ssl=1)
New geologic comparisons place the Grand Canyon’s inception more recently than 12 million years ago.
Moyan Brenn/Flickr (CC BY 2.0)
New geologic comparisons place the Grand Canyon’s inception more recently than 12 million years ago.
Moyan Brenn/Flickr (CC BY 2.0)