Oxygen is primarily made in nature through photosynthesis, a process used by plants, algae, and cyanobacteria. These organisms use sunlight, water, and carbon dioxide to create energy, releasing oxygen as a byproduct. This process has been ongoing since early microorganisms produced oxygen, gradually creating the oxygen-rich atmosphere that exists today. Oxygen is the most abundant … Read more
Oxygen is vital for humans because it enables cells to produce the energy needed to survive and perform all bodily functions. When we breathe in, oxygen enters the bloodstream, travels to the cells, and is used to break down food for energy. The body’s waste product from this process, carbon dioxide, is then carried back … Read more
During the Archean Eon (4 to 2.5 billion years ago), methane droplets in the air shrouded the young Earth in a global haze. There was no oxygen gas on Earth. Oxygen was only in compounds such as water. Complex chemical reactions in the young oceans transformed carbon-containing molecules into simple, living cells that did not … Read more
