Vision is crucial to survival. Its how ninety five percent of animals interpret the world. Eyes are so vital theyve evolved independently almost one hundred times, from the incredibly simple to the bafflingly complex. The results are a countless array of shapes, sizes, colours and abilities.

The natural world is packed with incredible superpowers. We find out why and how some of the worlds most amazing animals use their special powers to survive in a diverse range of environments, and how they push the limits of engineering to achieve incredible feats that humans can only dream of.

Sight and sound are two of humans most important senses, and to us the world seems full of dazzling colours and bustling noises. Beyond our scope of perception, there is an invisible world that humans know little about, but that some animals rely on in order to survive.