- Humans need Mars as a 'plan B' to avoid extinction, says physicist Michio Kaku: "The dinosaurs did not have a space program and that's why they are not here today to talk about it." https://www.abc.net.au/news/2018-11-15/physicist-michio-kaku-says-we-need-a-back-up-plan-for-survival/10495782 2939 comments space
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