The oldest fossilized vertebrate footprints ever discovered in the Grand Canyon were found embedded in a recently fallen boulder located in plain sight.
Around 314 million years agolong before the f…
Fallen Boulder at the Grand Canyon Exposes 300-Million-Year-Old Footprints
![Fallen Boulder at the Grand Canyon Exposes 300-Million-Year-Old Footprints](https://www.devroeprom.be/wp-content/uploads/2020/08/5930/fallen-boulder-at-the-grand-canyon-exposes-300-million-year-old-footprints-730x411.jpg)