Stay at Home Order … day 14 plus 14 seclusion retreat days
leaving the town
firefly ~Issa (cited: haikuguy.com)
Nikon D750 f/1.8 1/4000 35mm 200 ISO
“The rapid increase of carbon dioxide concentration in Earth’s modern atmosphere is a matter of major concern. But for the atmosphere of roughly two-and-half billion years ago, interest centres on a different gas: free oxygen (O2) spawned by early biological production. The initial increase of O2 in the atmosphere, its delayed build-up in the ocean, its increase to near-modern levels in the sea and air two billion years later, and its cause-and-effect relationship with life are among the most compelling stories in Earth’s history.”
(cited: Lyons, Timothy W.; Reinhard, Christopher T.; Planavsky, Noah J. The rise of oxygen in Earth’s early ocean and atmosphere: Nature, Volume 506, Issue 7488, pp. 307-315 (2014).
“The oxygen holocaust was a worldwide pollution crisis that occurred about 2,000 million years ago. Before this time there was almost no oxygen in the Earth’s atmosphere. The Earth’s original biosphere was as different from ours as that of an alien planet. But purple and green photosynthetic microbes, frantic for hydrogen, discovered the ultimate toxic waste, oxygen. Our precious oxygen was originally a gaseous poison dumped into the atmosphere. … (The atmospheres of Mars and Venus today are still more than 95 percent carbon dioxide; the Earth’s is only 0.03 percent.)…”
(cited: Lynn Margulis, Dorion Sagan Microcosmos: Four Billion Years of Microbial Evolution