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Fun facts! 1. Deoxygenation in ancient oceans coincides with the start of extinction events. 2. There is significant widespread deoxygenation in today's oceans.

phys.org

Oxygen depletion in ancient oceans caused major mass extinction

Late in the prehistoric Silurian Period, around 420 million years ago, a devastating mass extinction event wiped 23 percent of all marine animals from the face of the planet.

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Our of curiosity, how do we go about measuring the oxygen levels in such a massive body? Do scientists take samples from various depths and locations?

9:48 AM · Oct 8, 2019Twitter Web App