Humans (Moonfall)

In 2011, humanity is desperately trying to save itself from extinction as the Moon goes out of orbit and veers towards Earth. NASA sends a manned probe into a kilometers-deep artificial hole in the Moon, but a swarm appears and kills them. As the Moon's orbit continues to deteriorate, it falls closer to Earth and causes cataclysmic disasters such as tsunamis, gravitational abnormalities, and atmospheric dissipation as the Moon's gravitational pull strips the atmosphere of oxygen during its approach. As there are no active space shuttles available, NASA uses the retired Space Shuttle Endeavour to reach the Moon, manned by two astronauts and a conspiracy theorist Houseman who believes the Moon is an artificial megastructure.

As they enters the Moon's interior, they discover that the swarm is siphoning off energy generated by a white dwarf at the center of the Moon, causing the artificial megastructure's orbit to destabilize as its power source is depleted. Harper learns that the megastructure was constructed by the ancestors of humanity, who were more technologically advanced than their present-day descendants. The Moon was constructed billions of years in the past as an ark to repopulate humanity, which was being hunted by a rogue artificial intelligence that grew too strong. The swarm in the Moon is one of those AIs, which responds to electronic activity in the presence of organic life.

Houseman sacrifices himself to lure the swarm away from the spacecraft before detonating an explosive device, killing himself, destroying the AI, and allowing the astronauts to escape. With power restored, the Moon begins to return to its regular orbit, bringing an end to the destruction on Earth.