原推：That metacognitive life arose after 4 billion years and Earth will only remain habitable for 5 is a coincidence of timing that suggests (adjusting for observer effect) that the rise of metacognition is extraordinarily extraordinarily rare https://t.co/w93NIBURXf
We have less than a billion years to enjoy Earth before the Sun renders it inhospitable. https://t.co/dig3YWofBI