Phát hiện xương hóa thạch có thể của loài khủng long lớn nhất
Một nhóm nhà khoa học Argentina mới đây thông báo đã khai quật được những mảnh hóa thạch lớn có niên đại 98 triệu năm tuổi tại khu vực Tây Nam nước này.
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Theo TTXVN