More clinical tests were being performed on the 88-year-old pope, who had part of one lung removed as a young man.

When observing the night sky, it's easy to forget that every point of twinkling light is a star at some point in its life ...

It has puzzled scientists for years whether and how bacteria, that live from dissolved organic matter in marine waters, can carry out N2 fixation. It was assumed that the high levels of oxygen ...

Earth’s atmosphere is currently rich in oxygen, supporting a vast array of life. However, new research suggests that this ...

According to the calculations run by Ozaki and Reinhard, the oxygen-rich habitable history of Earth could end up lasting for ...