The earth has a history of more than 4 billion years, while human beings have only more than 3 million years. The huge time difference during this period has to make us think about a problem. Are we really the earliest civilization on earth? Of course, most of us don't know the answer, but we won't easily deny the possibility that other civilizations have never appeared on earth.

Recently, a scientist published a paper on early life in international weekly, which mentioned that the first life on earth was an archaea. This single-celled creature sees a purple world except its own color. This is because although they also use photosynthesis to maintain their life activities, their bodies lack chlorophyll like plants, so their ability to absorb energy is not so strong, which makes them like withered plants.

The author wrote in the article that traces of such creatures can still be found today, that is, in the dry valleys and oceans of Antarctica, the environment there is more inclined to the early state of the earth. In addition, since all living things on earth evolved from the same ancestor, they may still exist in modern visual systems, such as human eyes.

In other words, the original creatures are hidden in our eyes. This key point has been opposed by many scientists, but the author still believes that even if the first creatures on the earth are not purple, other planets are more likely to breed such creatures, and the alien life we are looking for is likely to be purple, not limited to the cognition on the earth, and thinks that the reason why we have never found them may be that we misunderstood their forms of existence!