Top 10 Animals that Humans Need to Survive
The help of several animals contributes to others' existence, and we don't think humans are an exception. We can always...
Know The Unknown
Group of living organisms other than human beings that having nervous system and other sense organs. Scientists estimated that there are 10 to 30 million species of animals are in the world. They are mainly classified as invertebrates, fishes, amphibians, reptiles, mammals and birds.