Carbon dioxide is being converted into oxygen on Mars thanks to an invention undergoing testing that could lead to the colonization of the red planet. Day and night across the seasons, a ...

Breathe easy, for now. Scientists say our breathable air won't last forever. A new NASA-supported study warns that Earth's oxygen supply is not a permanent feature of our planet. Though we often take ...

Most people believe rainforests are the lungs of our planet, pumping out vast amounts of the oxygen we breathe. This compelling image has shaped environmental campaigns and political speeches for ...