Feedback refers to a core concept in circuit design and control theory, used to stabilize amplifiers and control system ...

The Arctic is changing rapidly, and scientists have uncovered a powerful mix of natural and human-driven processes fueling that change. Cracks in sea ice release heat and pollutants that form clouds ...

Researchers discovered that pollution from North America's largest oil field has created multiple feedback loops accelerating Arctic warming and sea-ice loss, per a new study. Penn State scientists ...

Earth’s ecosystems are governed by natural balance systems that respond to prolonged stress. Scientists say rising temperatures, species loss, and resource depletion are pushing those systems toward ...