Some people believe that we should send messages from our planet to other ones to communicate with unknown life forms. At the same time, others think that this can be too dangerous because it can lead to dreadful consequences.
In fact, for decades, scientists transmit information and encrypted messages into space trying to contact with intelligent beings. They continue to send data about life on Earth, our culture and architectural heritage, scientific progress, inventions, features of our life and how we communicate with each other. For instance, he most popular one was the Arecibo Message. This is a radio signal that was sent on 1974 year and contained atomic numbers of the chemical elements, molecular formulas of DNA, information about man, humanity and the Solar System. Definitely, communication with unknown life forms may lead to enormous amount of discoveries. It can help humanity to know more about universe, life in it and our own civilization. Besides, the opportunity to share knowledge another intelligent life form can speed up technological progress in science, medicine and other fields. Moreover, it will also expand the horizons of humanity. Knowledge of the existence of other civilizations will change our understanding of our place in the world and the possibilities of development. Furthermore, contact with aliens may contribute to the unification of humanity by creating a sense of common purpose.
Nevertheless, such communications can be extremely dangerous for us. We cannot predict which consequences will have contact with another civilization because aliens can be hostile towards us. Even benevolent beings may accidentally harm us. In the history of the Earth, contacts between civilizations with different levels of development often led to catastrophic consequences for the less developed side. For example, when people tried to establish contact with tribes in the Amazon jungle, they soon died out due to colds because they had no immunity to it. Further, our messages may be understanded wrong, that can provoke misunderstandings and conflicts.
Thus, sending messages into space can has both good and bad consequences. It, definitely, can give us a lot of new information about life on others planets and also speed up technological progress on Earth. However, we do not know what consequences this may entail, so in my opinion, it is better to be careful. We should focus on in-depth study of the Universe by yourself and develop methods for possible contacts with alien civilizations because we are still not developed enough to maintain contact with them