Researchers say they have discovered bacteria that breathe electricity instead of oxygen, spurring new ideas for renewable ...

A new study reveals that the aerobic nitrogen cycle in the ocean may have occurred about 100 million years before oxygen began to significantly accumulate in the atmosphere, based on nitrogen isotope ...

Rice University scientists discovered bacteria thriving without oxygen by releasing electricity. These microorganisms use ...

This process requires specialized organs such as the lungs or gills. This oxygen is used for cellular respiration and metabolism, a byproduct of which is carbon dioxide.