A recent study on a species of fish that can breathe air and survive on land for extended periods of time has shed light on how our ancestors may have evolved from water to land. The study, published in the journal Nature, focused on the mudskipper, a fish that is native to mangrove swamps in Africa, Asia, and Australia.

The mudskipper has several adaptations that allow it to survive out of water, including the ability to breathe air and the ability to walk on land. In the study, researchers found that the mudskipper's eyes are also adapted to land life.

When the mudskipper is in water, its eyes are constantly blinking. This blinking helps to keep the eyes moist and protected from the water. However, when the mudskipper is on land, it blinks much less frequently. This is because the air is less harsh on the eyes than the water, so the mudskipper does not need to blink as often to keep them moist.

The researchers believe that this adaptation in the mudskipper's eyes may have been a key factor in the evolution of our ancestors from water to land. As our ancestors moved from the water to the land, they would have needed to develop adaptations that allowed them to survive in the air. The ability to blink less frequently would have been one such adaptation, as it would have helped to keep their eyes moist and protected from the harshness of the air.

This study provides new evidence to support the theory that our ancestors evolved from fish that lived in mangrove swamps. The mudskipper's adaptations to life on land provide a glimpse into the challenges that our ancestors faced as they made the transition from water to land.