Humans Vs Aliens

Aliens and humans are two different species, humans are considered as species having two arms, two legs, maintained facial features, emotions and expressions they are divided in male and female categories that are further divided into sub-categories as infants, kids, youngsters and adults. While aliens are considered as, lizard people or grey people having bigger heads and unusual bulgy eyes. Generally, humans live on planet earth and eat, drink, excrete and breath however aliens comes from other planets and are not defined as people who could eat or drink or excrete. In humans females are responsible for giving birth to their generations whereas, the reproductive system or phenomenon is not defined or ever been discussed by biologist.

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