1. Oxygen is the third most abundant element in the universe after Hydrogen and Helium. 2. Oxygen forms in the hearts of stars, with the fusion of a carbon-12 nucleus and a helium-4 nucleus (also known as an alpha particle). 3. In fact on earth, oxygen is the most common element, making up about 47% of the earth’s mass. 4. Oxygen is absolutely essential to human life, it is found in the air we breathe and the water we drink (H20). Humans inhale more than 6 billion tons of oxygen each year. 5. Cyanobacteria, which are organisms that “breathe” using photosynthesis, take in carbon dioxide and exhale oxygen, just like modern plants. Cyanobacteria were likely responsible for the first oxygen on Earth, an event known as the Great Oxidation Event some 2.4 billion years ago. 6. When oxygen first developed on Earth 2.4 billion years ago , it is believed that it wiped out nearly 99% of all life in simple forms mostly anaerobic organisms and paved the way for life as we know it today. The simples...
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