However, several other species have demonstrated the ability to learn both the sounds and meanings of many words in human language, as well as communicate through sign language. (motherhoodinpointoffact.com)
Some people insist that dogs do not understand human language, although many researchers around the world have discovered that the average dog can learn anywhere from 100 to 250 individual words. (puppywire.com)
Does the fact that other living beings do not speak human language mean that they know less? (survivalkit.lv)