how Earth got its oxygen

How Did Earth Get Oxygen: New Study Explains

Our planet was inhospitable and barren in the beginning, for quite a long time. When the oxygen kicked in, so did the multicellular life. But how did Earth get its blanket of oxygen? A team of scientists compiled in a...
what was

Earth Breathed This Before Oxygen: Incredible New Discovery

Billions of years ago, way long before oxygen was available, the infamous poison arsenic is said to be the compound that Earth breathed.  Scientists realized research in Chile's Atacama Desert, an area known as Laguna La Brava. They studied a...