Sometimes nature plays tricks on us, what we think we know to be true may not be.
Animals, for example, have lots of secrets, like their remarkable use of colour to attract mates or disguise themselves from predators. Well, it turns out they've been using colour in ways that have been tricking humans as well.
Some animals might appear blue, but they are deceiving you, don't believe me? Take a look at the video explaining why, and even how.