Activity for Adam R. Nelson‭

Type	On...	Excerpt	Status	Date
Question	—	Can any astronomical phenomenon block/scramble all radio signals from a planet, without making it completely uninhabitable? Let's assume that a human colony was established on an exoplanet, dozens of light years from another inhabited planet, with the expectation that no one"”not even the colonists' far-future descendants"”could inform the outside world of their existence in any way, unless they launched a physical object... (more)	—	about 9 years ago
Question	—	Fission vs. fusion as a heavily-restricted sci-fi power source In a sci-fi setting I'm working on, the power dynamics between two civilizations are maintained by one civilization ("captives") being completely dependent on the other civilization ("captors") for electrical power, in an environment (artificial colonies on an airless planet) where electricity is a l... (more)	—	over 9 years ago