Patrick follows the grizzly bears taking a risk by leaving their winter dens early. 2016 saw weather records broken at the park, Kate gets to grips with the science behind the data.
As winter turns to spring, temperatures rise and Yellowstone bursts into life. The wildlife emerges to explore this new green world but spring can be a perilous time with hungry predators and natural hazards to be faced.
It is summer and the wildlife of Yellowstone face new challenges. 2016 was the hottest year on earth since records began and rivers dry up and deadly wildfires burn out of control.
