Answer
It is believed that iron-eating bacteria are the first living organisms on this planet. A billion years ago, the planet only contained little oxygen and no ozone layer; thus, earth was subjected to high levels of ultra-violet radiation. It is believed that certain bacteria were able to eat dissolved iron with rust as the by product. Iron-bearing rock formation can be seen today as a result of this process.
Work Step by Step
It is believed that iron-eating bacteria are the first living organisms on this planet. A billion years ago, the planet only contained little oxygen and no ozone layer; thus, earth was subjected to high levels of ultra-violet radiation. It is believed that certain bacteria were able to eat dissolved iron with rust as the by product. Iron-bearing rock formation can be seen today as a result of this process.
