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
5 virus families that could cause the next pandemic, according to the experts
Allen Cheng, Monash University; Andrew van den Hurk, The University of Queensland; Cameron Webb, University of Sydney, and…
Addressing Some Misconceptions About Climate Change
You may have encountered several social media posts and content out there that claim climate change is something…
Scientists Discover New Dinosaur Species with Bird-Like Sleeping Position
At a Glance A team of scientists from Hokkaido University, the Hokkaido University Museum, North Carolina State University,…
Meltwater is hydro-fracking Greenland’s ice sheet through millions of hairline cracks – destabilizing its internal structure
Richard Bates and Alun Hubbard kayak a meltwater stream on Greenland’s Petermann Glacier, towing an ice radar that…