A series of clever experiments into the reptilian "third eye" has confirmed that lizards use this patch of light-sensitive cells as a sun-calibrated compass. To test how third eyes — technically known ...

Lizards have a little dot at the top of their heads that is called a “parietal eye.” This eye is not as complex or as useful as the two in the front of their heads, but it does react to light. Are ...

Lizards have a little dot at the top of their heads that is called a "parietal eye." This eye is not as complex or as useful as the two in the front of their heads, but it does react to light. Are ...