Posts by Citizen of the Cosmos
...can sterilize huge swaths of intergalactic space — regions
...can sterilize huge swaths of intergalactic space — regions spanning thousands of light-years. Some poor civilization spends a billion years drag...
...can sterilize huge swaths of intergalactic space — regions spanning thousands of light-years. Some poor civilization spends a billion years drag...
Trending Topics
© 2015