00:00Ancient footprints in Grand Canyon predate dinosaurs by millions of years.
00:06Across Arizona canyon walls and exposed desert rock, fossilized tracks reveal creatures moving
00:12across earth long before dinosaurs appeared.
00:16Scientists examine trackways inside the Grand Canyon, identify clawed footprints, and date
00:22them to more than 300 million years ago.
00:24An early reptile walks across wet sediment, presses deep footprints into mud, and leaves
00:30behind patterns preserved in stone for millions of years.
00:34Researchers map parallel track lines across rock layers, showing multiple animals moving
00:39across ancient landscapes long before modern continents formed.
00:44Geologists study sediment layers in Arizona, confirm the tracks predate dinosaurs, and connect
00:50them to early land-dwelling vertebrates.
00:52Erosion exposes more fossilized prints along canyon surfaces, revealing movement patterns
00:58from a time when the region looked nothing like today.
01:02From soft mud to hardened stone, these tracks capture motion from a world that existed hundreds
01:08of millions of years ago.
01:10Erosion exposes more than 100 million years ago.
01:10Long before dinosaurs roamed, something else already walked this ground.
01:14Some concreed did not rocket science, it was a great idea of finding a world in the
01:14It has been carried out by a world of 192 and many years old.
01:14What made you do not want this past year?
01:14To change degree and a world of 9000 years ago.
01:15What made you do not want this person?
01:15Or is it more
01:15a world of a world of a world of a world of a world of a world of a world
01:15of a world of a world
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