| 1 | Who are the culprits? | |
| 2 | The culprits in all this are the parathyroid glands. | |
| 3 | The scientists believe that rising sea surface temperatures are to blame. | |
| 4 | A temporary increase in melanin, the substance that colors hair eyes and skin, is the culprit. | |
| 5 | Obesity, smoking, lack of physical activity, high blood pressure, and high cholesterol are some of the culprits this study identified. |