Microscopic Cars Square Off In Big Race
This car race involved years of training, feats of engineering, high-profile sponsorships, competitors from around the world and a racetrack made of gold. And it's invisible to the naked eye.
Đọc thêm tại NPR
at May 3, 2017 at 05:13AM
Health & Science
Thứ Tư, 3 tháng 5, 2017
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