They may seem elusive, but northern lights - or aurora borealis - aren't all that uncommon. But to see them, the conditions ...

If you have chronic obstructive pulmonary disease (COPD) or another condition that impairs your lung function, you might not efficiently absorb oxygen when you breathe. The air we breathe contains ...

An oxygen tank is an oxygen storage vessel, which is either held under pressure in gas cylinders, referred to in the industry as high pressure oxygen cylinders, or as liquid oxygen in a cryogenic ...

The oxygen–hemoglobin dissociation curve, also called the oxyhemoglobin dissociation curve or oxygen dissociation curve (ODC), is a curve that plots the proportion of hemoglobin in its saturated ...

These 12 “facts” about our brains just aren’t true. Well, only for about 15 seconds. It takes that long for humans to lose consciousness in space due to lack of oxygen to the brain.

Abortion is a very safe way to end a pregnancy. Here are the facts about the different kinds of abortion and what to expect. Is abortion legal? It depends on where you live. Some states have banned ...

These rituals are part of a 2,000-year-old tradition known as the Grand Ceremony of the Worship of Confucius. Ahead of the celebrations, here are some key facts about Confucianism and the role ...

Eoghan Daltun rewilded his land in West Cork and wants more of Ireland to do the same. By Cara Buckley The Supreme Court’s decision to not temporarily block an E.P.A. rule this week signals ...