Why should mankind explore the universe? Who is the greatest enemy of mankind?

Why should mankind explore the universe?Who is the greatest enemy of mankind?
The earth is the home on which human beings live.In ancient times,human beings believed that the earth was the center of the universe.Many tribes fought to the death for land and resources,even in modern times.

With the rapid development of human science and technology,people have found that the earth inhabited by human beings is only a small planet in the vast universe,not even a drop in the ocean.In the whole universe,there are more planets larger than the sun than the sand on the earth.
With the improvement of human science and technology,the human survival ability is continuously enhanced,and the population is also increasing.The resources on the earth are limited,and one day they will be exhausted.If human beings want to survive forever,they must go out of the earth and explore the larger universe.

The dispute over the earth's resources has become increasingly fierce,and the current global resources can no longer meet the needs of all mankind.It will break the ambition of some countries to use space to occupy and rule the earth,the moon and Mars,and seek private interests.
As the horizon of mankind becomes wider and deeper,the understanding of the universe becomes deeper and deeper,and the ubiquitous crisis in the universe is discovered,such as radiation,planetary impact,invasion of extraterrestrial civilization,solar explosion and other situations that are enough to destroy the earth.

The purpose of space exploration is also to better protect and develop the earth.At present,the earth is facing serious challenges such as climate warming,ecological destruction,energy depletion and asteroid impact.This forces us to consider whether human beings need to migrate to other planets in the future.
If we want to continue civilization,we must redouble our efforts to explore and develop the universe,just as the world powers explored the new continent in those years.

There is no trace in the sky,but the birds have passed by.
The reason why people are alive and different from animals is that they have their own thoughts and advanced civilization.
In general,the most important reason for going out of the earth and into the universe is to enable human beings to survive better and human civilization to continue better.

At present,great achievements have been made in the fields of communication,navigation,remote sensing and other information for the long-term goal of utilizing space resources,and the dawn has also begun to appear in the development of material resources and energy.However,mankind's understanding of space is still the same as that of children playing with sand on the beach.
Mankind's desire for knowledge in space will be the eternal driving force for space exploration.There is no doubt that only through space exploration can mankind finally answer such philosophical questions that have puzzled mankind for a long time as"where did the universe come from","how did mankind come into being","the meaning of human existence".