Deep sighs physically reset the lung’s inner surface. This lowers breathing effort and explains why caregivers use controlled ...

High-resolution isotope data show that a modern-like, oxygen-rich atmosphere was not established until 410 million years ago, supporting a 2-billion-year transitional oxygenation of Earth’s surface.

Lush, green and brimming with trees and wildlife, forests are the Earth’s lungs and source of livelihoods for many ...

Indonesian environmentalist Pralensa steered his boat through a shallow canal in the marshy peatlands near his village, an environment he fears may soon disappear.