Những hố tròn bí hiểm ở Nga
Sự việc kỳ lạ liên tiếp xuất hiện kể từ cuối những năm 1980: giữa rừng già heo hút, người ta tìm thấy những cái hang sâu hoắm, thành hang nhắn thín và trơn tuột như thể hang lươn.
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