Ecologist John Harte overlooks his nearly 30-year experiment simulating the expected conditions in these meadows by 2050. Tangles of sagebrush grow under lines of heat lamps, pushing out some of the flowers and plants that normally cover the ground.

Ecologist John Harte overlooks his nearly 30-year experiment simulating the expected conditions in these meadows by 2050. Tangles of sagebrush grow under lines of heat lamps, pushing out some of the flowers and plants that normally cover the ground.