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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