This is a microscopic image of 2.5 billion-year-old sulfur-oxidizing bacterium.
CREDIT
Andrew Czaja, UC assistant professor of geology

Life before oxygen

From the UNIVERSITY OF CINCINNATI Ancient rocks hold evidence for life before oxygen Somewhere between Earth’s creation and where we are today, scientists have demonstrated that some early life forms existed just fine without any oxygen. While researchers proclaim the first half of our 4.5 billion-year-old planet’s life as an important time for the development and…

Scientists used fossilized plants, like this seed fern, to reconstruct the ancient atmospheric CO2 record from more than 300 million years ago.
CREDIT
William DiMichele/Smithsonian Institution

Claim: reconstructing climate from 300 million years ago from fossils says we’re in trouble now

From the UNIVERSITY OF CALIFORNIA – DAVIS What the ancient CO2 record may mean for future climate change Deep-time reconstruction shows tropical forests can deeply impact climate change The last time Earth experienced both ice sheets and carbon dioxide levels within the range predicted for this century was a period of major sea level rise, melting…

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Study: lakes started oxygenation problems long before fertilizers and climate change – blame urbanization

From the INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE – INRS Urbanization: The historical cause of low oxygen conditions in European lakes The secrets lake sediments have to share A new study shows that hypoxia, i.e. low oxygen conditions, in European lakes started in 1850, becoming more widespread after 1900, long before the use of chemical fertilizers…

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Solar variability and the Earth’s climate

Guest essay by Andy May According to Javier and the IPCC, total solar radiation output varies little, less than 0.1%. This is only 0.7 to 1.4 Watts/m2 compared to an IPCC anthropogenic effect estimate of 2.3 Watts/m2. They believe it has a small effect on the Earth’s climate. Others, like Abdussamatov, think solar output is…