When oxygen disappears, most fish suffocate. This one ferments its own metabolism and waits months for spring beneath frozen lakes.

Climate change is extending far beyond the threat of melting polar ice caps -- it's putting a dangerous stranglehold on life in oceans, too. A new study published in the science journal Nature ...

The oxygen desaturation index (ODI) measures how often and how much your blood oxygen level drops while you sleep. A normal ODI is fewer than five desaturation episodes per hour of sleep, and anything ...