Thứ Sáu, 30 tháng 9, 2016

NPR News: Are We Headed Into Another Mass Extinction?

Are We Headed Into Another Mass Extinction?
At various times, life on earth has come close to being erased. Paleontologist Peter Ward explains what we can learn from previous mass extinctions.

Đọc tiếp trên NPR
September 30, 2016 at 07:19PM
Environment

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