The chicken-and-egg question takes a scientific turn when it comes to determining whether oxygen production through photosynthesis or its consumption by aerobic metabolism (such as respiration) ...

Louisiana plans to use nitrogen gas to execute death row inmate Jessie Hoffman next week. Here's what to know about the ...

Take a deep breath. Do you ever think about the air entering your lungs? It’s mostly inert nitrogen, and the valuable oxygen our lives depend on only accounts for 21%. But this hasn’t always ...

Get to know the "absolutely astonishing" true story behind the new movie "Last Breath," which chronicles a 2012 deep-sea diving accident.