The planet was dying; very near a final, cataclysmic death. It's sun had been flaring for centuries and the planet's surface had been far too hot for life for the same centuries. All life was underground, sustained artificially. Scientists were well aware that when the sun made it's final flare-up before collapsing, the planet would be obliterated and that the end was near.
A fleet of small starships was created. Each was capable of carrying two people in a form of suspended animation similar to cryogenics with the added feature of a form of ravenous feeding. The ships traveled at very close to the speed of light. The plan was to send out the fleet in different directions with the hope that at least one would land on some planet somewhere in the universe that was capable of sustaining life. The launches weren't completely at random, certain galaxies had been identified as likely to include a habitable planet. But they weren't far from random. It was a wild shot at trying to make sure that the race would not die out but would be recreated elsewhere.
Each starship would continue to travel until sensors determined that a planet with something close to the correct atmosphere had been found. The ship would then automatically divert to that planet, find land and come down as controlled as possible. Each ship carried a boy and a girl, eight to ten years old when they were put aboard. Since time stops at the speed of light, the occupants of the ship would age extremely slowly even though the ship would travel literally thousands of light years.
Starship 1074 landed and its occupants were slowly awakened from their suspension. Both had aged slightly during travel and were now in the equivalent of their early twenties. And both were very hungry. Both were in acceptable physical shape but in fact their stomachs and digestive systems were totally empty.
The spaceship door was open and both walked out and slowly looked around. There were green plants everywhere, trees with fruit hanging from them, a small stream trickling nearby. The man grabbed a fruit off a tree and took a bite.
"It's odd tasting but seems edible," he said as he took another bite.