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Pushing the origins of life back nearly a billion years?!

Bridgette OConnor

Just read this essay on Aeon about the origins of life on Earth and how the Hadean Eon may not have lasted quite as long as previously thought. Would be a great topic to bring up with students and conduct some claim testing. The essay also complements Episode 2 of the Big History podcast and while you're there, check out Episode 3, Human Origins, which also discusses de-extinction. 

Unknowns Episode 2: Origins of Life on Apple and Spotify

Unknowns Episode 3: Human Origins (new today!) on Apple and Spotify

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     I was thinking the same. I’m teaching Unit 1 of Big History and introduced the big themes of the course—the fact that this is a science-based origin story and, as such, is subject to change as science evolves. I explained that Threshold # 6, Collective Learning, has recently been moved back to between 500,000 and 1,000,000 years (here’s the thread for those who want to read it). I found this article fascinating, and it adds even more to that discussion. This week I’ll be introducing the concept of claims, so the timing of this article is perfect. 

    Wouldn't it be great if students had to change the threshold cards based on new scientific discoveries? 

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     I was thinking the same. I’m teaching Unit 1 of Big History and introduced the big themes of the course—the fact that this is a science-based origin story and, as such, is subject to change as science evolves. I explained that Threshold # 6, Collective Learning, has recently been moved back to between 500,000 and 1,000,000 years (here’s the thread for those who want to read it). I found this article fascinating, and it adds even more to that discussion. This week I’ll be introducing the concept of claims, so the timing of this article is perfect. 

    Wouldn't it be great if students had to change the threshold cards based on new scientific discoveries? 

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