Oxygen fills the air today, but for most of Earth’s early history it barely existed. Scientists say the atmosphere did not hold steady oxygen until about 2.33 billion years ago, during the Great ...

Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 ...

Oxygen is everywhere on Earth today. But that hasn’t always been the case. Scientists think oxygen only became a lasting part ...

Researchers at Washington University in St. Louis have a unique resource in the form of the Center for Biomolecular ...

Respiration is the physiological process through which oxygen in the environment can be exchanged with carbon dioxide from an organism. This process requires specialized organs such as the lungs or ...

DNA's iconic double helix does more than "just" store genetic information. Under certain conditions, it can temporarily fold ...

The human genome has to be carefully organized so it will fit inside of the nuclei of cells, while also remaining accessible to the cellular machinery that works to express the right genes at the ...

Enzymes help with specific functions that are vital to the operation and overall health of the human body. They help speed up chemical reactions and are essential for respiration, digestion, muscle ...