Phát hiện vết tích biển đóng băng trên bề mặt sao Hỏa
Nhóm nghiên cứu do GS John Murray thuộc Đại học Open (Anh) phụ trách cho biết biển băng này có chiều dài 900 km, chiều rộng 800 km và sâu 45m.
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