icon bookmark-bicon bookmarkicon cameraicon checkicon chevron downicon chevron lefticon chevron righticon chevron upicon closeicon v-compressicon downloadicon editicon v-expandicon fbicon fileicon filtericon flag ruicon full chevron downicon full chevron lefticon full chevron righticon full chevron upicon gpicon insicon mailicon moveicon-musicicon mutedicon nomutedicon okicon v-pauseicon v-playicon searchicon shareicon sign inicon sign upicon stepbackicon stepforicon swipe downicon tagicon tagsicon tgicon trashicon twicon vkicon yticon wticon fm

Earth’s evolution delayed by 2bn years due to low oxygen levels - study

Earth’s evolution delayed by 2bn years due to low oxygen levels - study
Evolution was held back two billion years as a result of low oxygen levels during the Earth’s middle ages, according to the findings of a new study, which uncovered a delay in the development of plant life.

In a new paper from the University of Exeter, researchers discuss why oxygen levels were so slow to rise in the aftermath of the ‘Great Oxidation Event,’ when oxygen was introduced into the atmosphere, saying that this dampened growth, in turn, delayed the planet’s evolution.

After the great oxidation, plate tectonics pushed dead organic material that had gathered in sedimentary rocks to the surface. When this material reacted with oxygen in the air, it began consuming it.

The more the oxygen, the quicker this reaction occurred, meaning it was consumed at the same rate at which it was being produced, causing a knock-on effect in the development of plant life.

Using a computer model, the researchers estimate that atmospheric oxygen was probably around 10 percent of present levels.

As more plants developed, however, the more oxygen-producing photosynthesis took place, which in turn slowly reversed this trend, bringing up oxygen levels closer to today’s.

Dear readers and commenters,

We have implemented a new engine for our comment section. We hope the transition goes smoothly for all of you. Unfortunately, the comments made before the change have been lost due to a technical problem. We are working on restoring them, and hoping to see you fill up the comment section with new ones. You should still be able to log in to comment using your social-media profiles, but if you signed up under an RT profile before, you are invited to create a new profile with the new commenting system.

Sorry for the inconvenience, and looking forward to your future comments,

RT Team.