The call coming from the Dakota Grasslands summons the watchers when sail-back reptiles are noticed there. While doing their usual routine in this mission, they

Markie is a regular ten-year-old boy who has a normal life. That is until he uses his dad's time opener and accidentally blows it up, leaving the US parks vulne

In this adventure, Markie and the team are heading for California. In the San Bernardino National Forest, there is trouble brewing. Saber-toothed tigers and gia

When Markie and the team are called to the High Schells Wilderness in Nevada, they think that the situation is going to be easy. But when they get confronted by

Markie is a regular ten-year-old boy who has a normal life. That is until he uses his dad's time opener and accidentally blows it up, leaving the US parks vulne