A stone with more than 70 dinosaur tracks is transforming what we know about how prehistoric creatures interacted
The scientific treasures at NASA Goddard Space Flight Center in Maryland stretch back far before the space age, as a recent discovery illustrates.
It turns out they go at least back to the Cretaceous Period, when small mammals scurried about, intermingling with dinosaurs and hiding from hunting pterosaurs that swooped down from the skies.
http://www.businessinsider.fr/us/din...center-2018-2/