Những nhà thiên văn biết bay
Có lẽ nhiều người trong chúng ta không bao giờ biết vị trí của dải Ngân Hà trên bầu trời, nhưng bọ hung thường xuyên nhìn lên "sông Ngân" để xác định phương hướng.
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LuG7iVjhuqc0aVjhuqs44bqrWDDEg2rhuqvDo1gwY1jhu4nEg8OgWOG7icSDe+G7mVjDrMOpWDE64bqvWOG6qsOjPuG6q1jEgiZY4buJw6w44bqrWCB9xKlY4buJw6zhu4Xhuq/hu6Thu6gvaeG7quG7qGlYMOG6rSXhu4vhu4vhu6BXaeG7rWIx4buZV+G7quG7iMSDM2JYw7Thuqsz4buTacOsM+G7i+G7i+G7qC9p4buq