John Michael Godier | That Time Earth’s Oxygen Levels Catastrophically Dropped @JohnMichaelGodier | Uploaded April 2024 | Updated October 2024, 1 hour ago.
An exploration of the oxygen level variations in earth's atmosphere during the late Cretaceous that was already affecting the dinosaurs adversely.

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Cylinder Eight by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0

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Cylinder Five by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0

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Impending Boom by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0

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Lost Frontier by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0

Source: incompetech.com/music/royalty-free/index.html?isrc=USUAN1100783