Cosmic dust reveals Earth's ancient atmosphere

Science Daily ^ | 5/11/2016 | Monash University

[SunkenCiv]

Thanks JimSEA.

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[SunkenCiv]

Early Earth keyword, sorted alpha:

• Abiogenesis: The First Frontier [2002]
• Ancient bubbles in Australian rocks show early Earth's air weighed less (trunc) [2016]
• Ancient Rocks Show How Young Earth Avoided Becoming Giant Snowball [2007]
• Calculations favor reducing atmosphere for early earth: Was Miller-Urey experiment correct? [2005]
• Clandestine comets found in main asteroid belt - Earth oceans origin [2006]
• Comet's water 'like that of Earth's oceans' [2011]
• Cosmic dust reveals Earth's ancient atmosphere [2016]
• Cosmic Impacts May Have Seeded Early Earth with Ingredients for Life [2015]
• Did Life Come from Another World?(Long Read) [2005]
• Double Whammy: 2 Meteors Hit Ancient Earth At The Same Time [2015]
• Early Earth Likely Had Continents, Was Habitable, According To New Study [2005]
• Early Earth Was Purple, Study Suggests (Go Vikes!) [2007]
• From Old Vials, New Hints on Origin of Life [2008]
• Is Ice a Catalyst for Life Throughout the Universe? [2008]
• Life-Swapping Scenarios for Earth and Mars [2004]
• Organic-Rich Soup-in-the-Ocean of Early Earth [Miller experiment revisited] [2005]
• Prebiotic Soup--Revisiting the Miller Experiment [biogenesis] [2003]
• Rosetta finds molecular oxygen on comet 67P [2015]
• Rosetta Instrument Reignites Debate on Earth's Oceans [2014]
• Row erupts over 'life-starter' vents [2003]
• Salt of the Early Earth [2005]
• Sea floor records ancient Earth [2007]
• Small Comets and Our Origins [2004]
• So, where did the water on Mars come from? [2004]
• Solar System Ice: Source of Earth's Water [2012]
• "Space rock" reveals life's origins [2008]
• Titanium Paternity Test Fingers Earth as Moon's Sole Parent [2012]
• Volume of world's oldest water estimated [2014]
• We are all made of comet dust [2013]
• Where on Earth has our water come from? [2010]
• Why Didn't Early Earth Freeze? The Mystery Deepens (Another CO2 hypothesis is debunked!) [2010]

[alexander_busek]

O3 is formed out of O2. What would you have O2 formed out of? Windborne rootless plants?

?!

No: In the ozonosphere, three O2 molecules are (temporarily) formed from two O3 molecules. Then, the process is reversed. Thus, atomic oxygen (i.e., single atoms of oxygen) is also present to a certain degree. And don't forget that - compared to ground level - it's a near-vacuum up there. Methane in such miniscule concentrations wouldn't "burn" with a visible flame.

Regards,