Animals began using color signals even more recently, starting with aposematic warnings, according to Wiens and Emberts. (Bernard Spragg/Flickr) Their analysis suggests warning colors evolved about ...

As their name suggests, these octopuses feature numerous blue rings on their bodies and arms. These rings are an example of aposematism, where animals use bright colours as a warning to would-be ...

As their name suggests, these octopuses feature numerous blue rings on their bodies and arms. These rings are an example of aposematism, where animals use bright colours as a warning to would-be ...