Activity for ramuf‭

Type	On...	Excerpt	Status	Date
Question	—	Subtle ways to render a planet uninhabitable A violent way of rendering a planet uninhabitable being the obvious: accelerate a large enough object to a sufficient velocity that everything on the planet goes the way of the dinosaurs. Put briefly, an alien race secretly constructed a series of autonomous spacecraft that would go to other solar s... (more)	—	over 5 years ago