Of the many unexplained phenomenon which continue to puzzle scientists and laymen like, the corn circles of Southern England remain one of the most mysterious

Here are the identified mistakes and their corrections in the provided text:

1. **Line 1**: "phenomenon" should be "phenomena" (plural).
- **Correction**: "phenomena"

2. **Line 2**: "laymen like" should be "laymen." (Remove "like" or change it to "such as").
- **Correction**: "laymen."

3. **Line 5**: "These perfect-formed circles" should be "These perfectly formed circles".
- **Correction**: "perfectly formed circles"

4. **Line 6**: "when they see from the air" should be "when seen from the air".
- **Correction**: "when seen from the air"

5. **Line 7**: "inscribed with an enormous carving tool" is misleading; it might be clearer to say "created by an enormous carving tool".
- **Correction**: "created by an enormous carving tool"

6. **Line 8**: "so far, however, nobody managed to decipher it" should be "so far, however, nobody has managed to decipher it".
- **Correction**: "has managed to decipher it"

7. **Line 9**: "come forward claiming" should be "have come forward claiming".
- **Correction**: "have come forward claiming"

8. **Line 9**: "the circles ourselves, scientists declare" should be "the circles themselves, scientists declare".
- **Correction**: "the circles themselves"

9. **Line 9**: "on so a large scale" should be "on such a large scale".
- **Correction**: "on such a large scale"

With these corrections, the text will read more clearly and accurately.