Due to technical difficulties from last night's SETI Talks event, which were joined already in progress here on Facebook, we have uploaded the full version. Enjoy! This presentation was streamed live from the California Academy of Sciences in San Francisco. Human society and the global ecosystem are at a critical point in time, facing climate and biodiversity crises. According to a recent analysis, the sixth mass extinction of wildlife on Earth is accelerating. More than 500 species of land anim

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