On Monday, former football great Herschel Walker rhapsodised about how Donald Trump had once accompanied his family to Disney World, while senator Tim Scott of South Carolina, the lone black Republican in the Senate, lauded Mr Trump for creating an “inclusive economy”.

Geologist Allan Krill was hiking along the Grand Canyon National Park’s Bright Angel Trail with a group of students in 2016 when he spotted it: a fallen boulder lying just off the side of the trail, with curious markings that resembled footprints. Krill, who was visiting the University of Nevada, Las Vegas (UNLV) from Norway, sent photos of his find to an old friend and colleague, Stephen Rowland, a UNLV paleontologist.

Former football great Herschel Walker rhapsodized about how Donald Trump had once accompanied his family to Disney World. Sen. Tim Scott of South Carolina, the lone Black Republican in the Senate, took the stage to affirm the “goodness of America.”

A new research paper led by paleontologist Steve Rowland at the University of Nevada, Las Vegas analyzes this chance find of two sets of footprints (also called trackways) on the same rock that are potentially both from the same unknown species.

It's something like a modern-day chuckwalla, side-stepping sand dunes on an island in what now is Grand Canyon National Park.

On Wednesday, more 17,000 coronavirus tests were completed in Nevada — the most ever in a single day in the state since testing began in March.

A rock tumble at the Grand Canyon revealed fossil footprints that researchers say are among the oldest in the park.

Footprints found on a boulder which had stood in plain view of tourists in the Grand Canyon actually date from an astonishing 313 million years ago, researchers in America have confirmed.