The color of Earth’s sky has changed over time due to the presence and activities of different life forms. Initially, the sky had a grayish-blue-green tint due to a nitrogen and carbon-dioxide-rich atmosphere with little oxygen. Methanogenic bacteria then turned the sky orange by producing methane, which formed hazes that absorbed blue light. Eventually, cyanobacteria produced oxygen, which cleared the haze and restored the sky to its current blue color.
Related Posts
Mathematical Model Reveals Cellular Flows in Chick Embryos
At a Glance One of the fundamental questions in biology is how cells organize themselves to form complex…
Scientists Just Dug Out the Deepest Ocean Hole Ever
Studying the planet’s surface is an arduous task; oftentimes the scientists responsible for doing so need to take…
New Snake Species Discovered in Saudi Arabia’s Hejaz Region
At a Glance A team of international scientists led by researchers from the Centro de Investigação em Biodiversidade…
A Volcano Sprang Forth Under the Indian Ocean—Right Under Everyone’s Noses
It’s no surprise to anyone at this point that volcanoes don’t really get pressured when it comes to…