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

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 ...

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 ...

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 ...

WASHINGTON (Reuters) - Hungry microbes feasting on spilled BP oil caused a drop in oxygen levels in the Gulf of Mexico, but did not create a marine "dead zone" near the wellhead, U.S. scientists ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. This voice experience is generated by AI. Learn more. This ...

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s often triggered by lung or heart conditions like COPD, asthma, or heart ...

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 ...