Politics Aside, Counting Crowds Is Tricky
Claims about the size of crowds for both President Trump's inauguration and the protests that followed the day after, are being debated. Scientists struggle with how to do that kind of head count.
Đọc thêm tại NPR
at January 24, 2017 at 05:11AM
Health & Science
Thứ Ba, 24 tháng 1, 2017
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