The very air we breathe, composed of approximately 21% oxygen, is the lifeblood of our planet. It sustains everything from microscopic organisms to towering redwoods and, of course, humanity. But what ...

Does the presence of oxygen mean the existence of life? That’s a question that scientists have been debating over recent years as technology and missions into outer space advance and sustain interest ...

In our quest for life beyond the Solar System, it makes sense to look for a world like our own. We've long hoped to find an Earth-sized world around a Sun-like star at the right distance for liquid ...

A healthy blood oxygen level is 75–100 mm Hg, or 95–100%. Low blood oxygen levels, known as hypoxemia, may be a cause for concern. Your blood oxygen level is a measure of how much oxygen your red ...

ROP is a leading cause of blindness among infants in developed (1) and middle-income countries (2). The role of high concentrations of supplemental oxygen was first recognized in the 1950s (3), and ...