Nighttime drops in ocean oxygen raise energy use in small reef fish. Repeated stress could affect reef health as oceans warm.

Add Yahoo as a preferred source to see more of our stories on Google. Earth with a glowing horizon For now, life is flourishing on our oxygen-rich planet, but Earth wasn't always that way – and ...

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 ...

Oxygen is one of the many components that make life on Earth possible. However, a new study says that an extreme drop in oxygen could one day suffocate most of the life on our planet. Luckily, that ...

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 ...

Experts say the standard dissolved oxygen level for a river is 5 mg/liter. An oxygen level lower than this indicates an ailing aquatic ecosystem ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth with a glowing horizon For now, complex life flourishes on our planet thanks to its supply of oxygen. But Earth's atmosphere ...