Earth Day is April 22nd this year. Since its beginning in 1970, Earth Day has served as a yearly reminder of just how ...

Green oceans on early Earth, shaped by iron, pushed microbes to evolve light-absorbing tools that worked in green light.

The Earth maintained green oceans for billions of years before the current ... During their early phase of existence, these simple life organisms depended upon anaerobic photosynthesis without ...

Although chlorophyll is great for photosynthesis in the spectra of light visible to us, PEB seems to be superior in green-light conditions. Before the rise of photosynthesis and oxygen ...

Earth's oceans were once green, according to a new study. Carl Sagan, the host of the popular TV show Cosmos, once described Earth as a 'pale blue dot' when explaining an image taken by Voyager 1.