As It Happens6:36Researchers discover thousands of dinosaur footprints in AlaskaDustin Stewart has been obsessed with dinosaurs since he was nine...
footprints
Fossilized footprints discovered in New Mexico indicate that early humans were walking across North America around 23,000 years ago, researchers...
WASHINGTON -- Fossilized footprints discovered in New Mexico indicate that early humans were walking across North America around 23,000 years...