When The Earth Was Purple

PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ↓ More info below ↓ Besides the blue of the oceans, the dominant color of our planet, as we know it, is green. But imagine a time when the Earth looked a little … purple. Produced for PBS Digital Studios. Want to follow Eons elsewhere on the internet? Facebook - https://www.facebook.com/eonsshow Twitter - https://twitter.com/eonsshow Instagram - https://www.instagram.com/eonsshow/ References: https://www.livescience.com/1398-early-earth-purple-study-suggests.html http://www.jstor.org/stable/27858961 http://www.amnh.org/explore/science-bulletins/earth/documentaries/the-rise-of-oxygen/article-earth-without-oxygen/ https://origins.asu.edu/blog/oxygenation-catastrophe https://www.scientificamerican.com/article/archaebacteria-the-third/ https://www.asm.org/ccLibraryFiles/FILENAME/000000002127/znw00306000120.pdf http://science.jrank.org/pages/5195/Photosynthesis-Halobacterium.html