History of Human Space Exploitation

In the 23rd century AD, humans observed that an iron asteroid would hit Mars in 200 years.After the asteroid hits Mars, the shattered fragments of Mars will hit the earth with a high probability, making humans extinct like dinosaurs.
With the concerted efforts of all human beings around the world, the crisis of the destruction of Mars has been resolved through 400 years of hard work.At the same time, people accidentally discovered the Star Tunnel.The Star Tunnel is a new astrophysical discovery, and the aircraft can expand its footprint to the entire universe without breaking the physical limit of the speed of light.
Since then, human beings have begun to expand their footprints to the entire Virgo supercluster...

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