There are certain abilities humans possess that we often take for granted, simply because they’ve always been a part of our lives. One such ability is the simple act of looking up.

Surprisingly, some animals lack this capability. For instance, did you know that pigs are unable to look up at the sky? Their neck and spine anatomy prevent them from performing this seemingly simple task.

To begin with, pigs have eyes on the sides of their heads. This is common in animals that have to always be on the lookout for predators. But while this gives them a panoramic view of 310 degrees, this positioning also means that they have a blind spot directly in front of their snouts and another directly above their heads, which makes it impossible for them to look up, as they only have a 50-degree upward vision.