Tag: oxygen
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PBS Eons: Why Only Earth Has Fire
PBS Eons has a new episode. This one is about the evolution of our planet’s atmosphere and how life makes fire possible. To get fire, which exists only on Earth, it took billions of years of photosynthesis – which means fire can’t exist without life. And fire and life have been shaping each other ever…
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PBS Eons: That Time The Ocean Lost (Almost) All Its Oxygen
PBS Eons has a new episode on Youtube. This one is about an extinction event during the Cretaceous Period and what it did to the oceans. This is the story of how our planet rescued itself from extreme conditions in the Cretaceous Period, at the cost of essentially suffocating the oceans for half-a-million years.
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SciNews: Elevated Levels of Oxygen Gave Rise to North American Dinosaurs, Scientists Say
SciNews has a post about the rise of the dinosaurs during the Triassic. It seems that oxygen rose over 25% in 3 million years. That change might have led to the expansion of dinosaurs around 215 million years ago. The paper was presented at the 2019 Goldschmidt Conference in Barcelona, Spain. A team of researchers…
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Molecular Evolution of Oxygen
Via Science Daily: … researchers report they have identified an enzyme that was the first — or among the first — to generate molecular oxygen on Earth… The new findings, reported in the journal Structure, build on more than a dozen previous studies that aim to track the molecular evolution of life by looking for evidence…
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Amber Yields Clues to the History of Oxygen in Earth’s Atmosphere
Via geology.com: Gas bubbles trapped in amber show an oxygen-rich Cretaceous atmosphere Republished from an information release posted by USGS in June, 2009. In addition: amber in India’s Cambay area has new information too.
