Rùa cạn tiến hoá để tránh bị lật ngửa
Với một chú rùa cạn, bị lật ngửa là kịch bản khổ sở và tai họa nhất. Vì thế để tránh điều đó, một vài loài đã tiến hoá một mẹo khá thông minh - tạo ra cái mai có hình dạng giữ thăng bằng hoàn hảo.
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