Pachycephalosaurus Dome Fragment Size:Small Above: Challenger hitches a ride

Above: Challenger hitches a ride on NASA's Boeing 747 Shuttle Carrier Aircraft (SCA)

About the Sikhote Alin Meteorite

959 passengers aboard

We know of this incredible time thanks to the fossil imprints left behind by plants that were preserved for millions of years

The specimens are then split by hand and reviewed by members of the team

Pachycephalosaurus Dome Fragment Size:Small Above: Challenger hitches a ridePachycephalosaurus was a Late Cretaceous dinosaur with a unique feature: its skull had a battering ram like bone plate. This several inch thick helmet of bone allowed it to absorb blunt force when it struck its head against surfaces. This specimen is a piece of a Pachycephalosaurus skull dome fossil recovered from the Hell Creek formation in South Dakota. It's estimated to be over 66,000,000 years old. Both small and medium sized fragments are