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
Meg 2: the truth about the extinct mega shark – and why even this ridiculous film could inspire future palaeontologists
Jack Cooper, Swansea University Otodus megalodon, the biggest shark of all time, has long captured the imaginations of…
The Viewpoint: A century after its discovery, scientists capture first confirmed footage of a colossal squid in the deep
Scientists Capture First Confirmed Footage of a Colossal Squid A century after its discovery, scientists capture first confirmed…
Scientists Say We May Have Gone Past Earth’s “Safe Boundary” For Chemical Pollutants
According to the World Health Organization, some 4.2 million individuals die every year due to exposure to some…
How the Megalodon Went Extinct (Yes, It’s Truly Extinct)
Megalodons reached lengths of up to 20 meters, three times longer than great white sharks, with teeth suggesting…