Cleaning a fish tank is a delicate process. Discover how to change water without throwing a tank's ecosystem into disarray.

Researchers develop a lab-on-a-drone system that measures nitrate levels in water mid-air to support agriculture and reduce runoff pollution.

Southeast Asia’s Mekong River is one of the world’s most diverse and productive freshwater ecosystems, home to more than ...

Reservoirs along the river may never rise to previous levels. Utah's Lake Powell has a "bathtub ring" that rises at least 70 feet above the water. Peter McBride From its source high in the Rocky ...