There is so much lava and molten rock and no water for me to survive yet!
4-2.5 Billion years ago
Finally! Some oxygen is being formed by bacteria in the oceans! Look! There are bubbles appearing!
2.6 Billion to 400 Million years ago
Wow! Blue skies! Truly beautiful, our world.
As the earth cooled, Earth's atmosphere was formed primarily from gasses. After 500 million years, the surface of the earth cooled and became more solid for water to form.
700-550 Million years ago
Wow! I can breathe so much better now! And look at those cool animals in the water! Hi, welcome to earth fellow beings
Cyanobacteria - bluish-green organisms - became apparent in oceans and create oxygen from the process of photosynthesis. The cyanobacteria kept creating oxygen until the percentage of oxygen was 1% at the time.
Thank you, past ancestors, for adapting to help me survive today!
As oxygen levels increased, There was plentiful enough oxygen for it to react with the methane in the atmosphere. 2 billion years ago, the methane haze cleared and the skies turned blue. There was also enough oxygen for the atmosphere to oxidize the iron
400-290 Million years ago
Woah! I wonder what all those black rocks are! What if they're valuable? Maybe I should stock up on some
The oxygen in the ocean increased radically. 600 million years ago the atmosphere reached ⅕ of today’s oxygen levels. Scientists say that due to the increase in oxygen, sea life increased drastically.
Humans are aerobic organisms. Aerobic organisms use oxygen to release protein, fats, and carbohydrates from food. This ability comes from our ancient ancestors that adapted to survive with the rapid increase in oxygen.
After plants on the planet increased, the amount of oxygen also increased. The oxygen kept increasing up to 35% over the next 50 million years. After heat and pressure, the buried remains of the plants were transformed into large deposits of coal.