About 150 million years ago, a long-necked dinosaur walked across a sandy flat that now sits high above Ouray, Colorado.
Its feet sank into wet sediment, and those steps hardened into a looping line of fossil footprints that scientists are now…
About 150 million years ago, a long-necked dinosaur walked across a sandy flat that now sits high above Ouray, Colorado.
Its feet sank into wet sediment, and those steps hardened into a looping line of fossil footprints that scientists are now…