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

One in five molecules in Earth’s air is oxygen. We have life itself to thank. Over time, a planetary balancing act of plants and animals and rocks and water has stabilized the oxygen in our atmosphere ...

MANKATO, Minn. — People who frequent shallower lakes this spring may notice more than the usual number of dead fish floating to shore once the ice melts. And that's not necessarily a bad thing. Brian ...