Many animal species can see ultraviolet light but human beings cannot see this light. Why? Give an ultimate explanation. - Quora
Did you know? Scientists always knew that several insects, birds and reptiles were capable of seeing ultraviolet. Among mammals, this ability was always considered rare and restricted to only a few species.
![Cats and dogs have a 'sixth sense' - and it's UV vision (but scientists don't know how they use it) | Daily Mail Online Cats and dogs have a 'sixth sense' - and it's UV vision (but scientists don't know how they use it) | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2014/02/19/article-2562951-1BA3137000000578-496_634x421.jpg)