Blinking fish provides insights into how life first evolved on land

Scientists believe that the ability to blink in humans as well as tetrapods (four-legged animals) also evolved during the transition from water to land.

Two mudskippers (Boleophthalmus caeruleomaculatus) in shallow waters.

An unusual blinking fish is helping scientists understand more about how human ancestors transitioned to life on land from water millions of years ago.

It is thought that life on Earth first began in the ocean around 3.5 million years ago.