Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ The earth lost almost all of its oxygen 2.3 billion years ago

The earth lost almost all of its oxygen 2.3 billion years ago



Earth’s transition to permanent host to an oxygenated atmosphere was a stopping process that took 100 million years longer than previously thought, according to a new study.

When the Earth was first formed 4.5 billion years ago, the atmosphere contained almost none oxygen. But 2.43 billion years ago, something happened: Oxygen levels began to rise and then fall, accompanied by massive climate change, including several ice sheets that may have covered the entire globe in ice.


Source link